Notebooks/1_Intro_to_CDS_services_in_notebooks.ipynb

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    "# CDS services in Jupyter notebooks\n",
    "\n",
    "Katarina A. Lutz¹, Manon Marchand¹\n",
    "\n",
    "1. Université de Strasbourg, CNRS, Observatoire Astronomique de Strasbourg, UMR 7550, F-67000, Strasbourg, France\n",
    "\n",
    "***\n",
    "\n",
    "\n",
    "\n",
    "## Introduction\n",
    "\n",
    "Welcome to a Jupyter notebook demonstrating how to access some of the services provided by the Strasbourg astronomical Data Center ([CDS](https://cdsweb.u-strasbg.fr/)) with Python.  \n",
    "\n",
    "In this tutorial, we will:\n",
    "1. gather information on a specific object using [![Simbad](https://custom-icon-badges.demolab.com/badge/Simbad-gray.svg?logo=simbad&logoColor=lightblue&logoWidth=20)](https://simbad.u-strasbg.fr/simbad/ \"https://simbad.u-strasbg.fr/simbad/\"), \n",
    "2. visualise it through survey images using the [![Aladin](https://custom-icon-badges.demolab.com/badge/Aladin-gray.svg?logo=aladin&logoColor=purple&logoWidth=20)](https://aladin.cds.unistra.fr/aladin.gml \"https://aladin.cds.unistra.fr/aladin.gml\") Lite widget, \n",
    "3. find and download a catalogue from [![Vizier](https://custom-icon-badges.demolab.com/badge/Vizier-gray.svg?logo=vizier&logoColor=orange&logoWidth=20)](https://vizier.cds.unistra.fr/viz-bin/VizieR \"https://vizier.cds.unistra.fr/viz-bin/VizieR\"),\n",
    "4. overlay the sources of this catalog on the sky view in the Aladin Lite widget, \n",
    "5. cross-match the sources with a large catalogue using [![Xmatch](https://custom-icon-badges.demolab.com/badge/Xmatch-gray.svg?logo=xmatch&logoColor=blue&logoWidth=20)](http://cdsxmatch.u-strasbg.fr/ \"http://cdsxmatch.u-strasbg.fr/\"). "
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    "# Astronomy tools\n",
    "import astropy.units as u\n",
    "\n",
    "# Access astronomical databases\n",
    "from astroquery.simbad import Simbad\n",
    "from astroquery.vizier import Vizier\n",
    "from astroquery.xmatch import XMatch\n",
    "\n",
    "# Sky visualization\n",
    "from ipyaladin import Aladin"
   ]
  },
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   "source": [
    "## Step #1: Gather information on NGC4038 \n",
    "\n",
    "\n",
    "[![Simbad](https://custom-icon-badges.demolab.com/badge/Simbad-gray.svg?logo=simbad&logoColor=lightblue&logoWidth=20)](https://simbad.u-strasbg.fr/simbad/ \"https://simbad.u-strasbg.fr/simbad/\")\n",
    "\n",
    "\n",
    "As a first step, we check what information is directly available from the <ins>Simbad</ins> python module. We can look at the methods available for the `Simbad` class with the `help()` command:"
   ]
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     "text": [
      "Help on SimbadClass in module astroquery.simbad.core object:\n",
      "\n",
      "class SimbadClass(SimbadBaseQuery)\n",
      " |  The class for querying the Simbad web service.\n",
      " |  \n",
      " |  Note that SIMBAD suggests submitting no more than 6 queries per second; if\n",
      " |  you submit more than that, your IP may be temporarily blacklisted\n",
      " |  (http://simbad.u-strasbg.fr/simbad/sim-help?Page=sim-url)\n",
      " |  \n",
      " |  Method resolution order:\n",
      " |      SimbadClass\n",
      " |      SimbadBaseQuery\n",
      " |      astroquery.query.BaseQuery\n",
      " |      builtins.object\n",
      " |  \n",
      " |  Methods defined here:\n",
      " |  \n",
      " |  __init__(self)\n",
      " |      Initialize self.  See help(type(self)) for accurate signature.\n",
      " |  \n",
      " |  add_votable_fields(self, *args)\n",
      " |      Sets fields to be fetched in the VOTable. Must be one of those listed\n",
      " |      by `list_votable_fields`.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      list of field_names\n",
      " |  \n",
      " |  get_field_description(self, field_name)\n",
      " |      Displays a description of the VOTable field.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      field_name : str\n",
      " |          the name of the field to describe. Must be one of those listed\n",
      " |          by `list_votable_fields`.\n",
      " |      \n",
      " |      Examples\n",
      " |      --------\n",
      " |      >>> from astroquery.simbad import Simbad\n",
      " |      >>> Simbad.get_field_description('main_id')\n",
      " |      main identifier of an astronomical object. It is the same as id(1)\n",
      " |      >>> Simbad.get_field_description('bibcodelist(y1-y2)')\n",
      " |      number of references. The parameter is optional and limit the count to\n",
      " |      the references between the years y1 and y2\n",
      " |  \n",
      " |  get_votable_fields(self)\n",
      " |      Display votable fields\n",
      " |      \n",
      " |      Examples\n",
      " |      --------\n",
      " |      >>> from astroquery.simbad import Simbad\n",
      " |      >>> Simbad.get_votable_fields()\n",
      " |      ['main_id', 'coordinates']\n",
      " |  \n",
      " |  list_votable_fields(self)\n",
      " |      Lists all the fields that can be fetched for a VOTable.\n",
      " |      \n",
      " |      Examples\n",
      " |      --------\n",
      " |      >>> from astroquery.simbad import Simbad\n",
      " |      >>> Simbad.list_votable_fields()\n",
      " |      --NOTES--...\n",
      " |  \n",
      " |  list_wildcards(self)\n",
      " |      Displays the available wildcards that may be used in Simbad queries and\n",
      " |      their usage.\n",
      " |      \n",
      " |      Examples\n",
      " |      --------\n",
      " |      >>> from astroquery.simbad import Simbad\n",
      " |      >>> Simbad.list_wildcards()\n",
      " |      * : Any string of characters (including an empty one)...\n",
      " |      \n",
      " |      [^0-9] : Any (one) character not in the list.\n",
      " |      \n",
      " |      ? : Any character (exactly one character)\n",
      " |      \n",
      " |      [abc] : Exactly one character taken in the list.\n",
      " |              Can also be defined by a range of characters: [A-Z]\n",
      " |  \n",
      " |  query_bibcode(self, bibcode, wildcard=False, verbose=False, cache=True, get_query_payload=False)\n",
      " |      Queries the references corresponding to a given bibcode, and returns\n",
      " |      the results in a `~astropy.table.Table`. Wildcards may be used to\n",
      " |      specify bibcodes.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      bibcode : str\n",
      " |          the bibcode of the article\n",
      " |      wildcard : boolean, optional\n",
      " |          When it is set to `True` it implies that the object is specified\n",
      " |          with wildcards. Defaults to `False`.\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      table : `~astropy.table.Table`\n",
      " |          Query results table\n",
      " |  \n",
      " |  query_bibcode_async(self, bibcode, wildcard=False, cache=True, get_query_payload=False)\n",
      " |      Serves the same function as `query_bibcode`, but\n",
      " |      only collects the response from the Simbad server and returns.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      bibcode : str\n",
      " |          the bibcode of the article\n",
      " |      wildcard : boolean, optional\n",
      " |          When it is set to `True` it implies that the object is specified\n",
      " |          with wildcards. Defaults to `False`.\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      response : `requests.Response`\n",
      " |           Response of the query from the server.\n",
      " |  \n",
      " |  query_bibobj(self, bibcode, verbose=False, get_query_payload=False)\n",
      " |      Query all the objects that are contained in the article specified by\n",
      " |      the bibcode, and return results as a `~astropy.table.Table`.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      bibcode : str\n",
      " |          the bibcode of the article\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      table : `~astropy.table.Table`\n",
      " |          Query results table\n",
      " |  \n",
      " |  query_bibobj_async(self, bibcode, cache=True, get_query_payload=False)\n",
      " |      Serves the same function as `query_bibobj`, but only collects the\n",
      " |      response from the Simbad server and returns.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      bibcode : str\n",
      " |          the bibcode of the article\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      response : `requests.Response`\n",
      " |           Response of the query from the server.\n",
      " |  \n",
      " |  query_catalog(self, catalog, verbose=False, cache=True, get_query_payload=False)\n",
      " |      Queries a whole catalog.\n",
      " |      \n",
      " |      Results may be very large -number of rows\n",
      " |      should be controlled by configuring `SimbadClass.ROW_LIMIT`.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      catalog : str\n",
      " |          the name of the catalog.\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      table : `~astropy.table.Table`\n",
      " |          Query results table\n",
      " |  \n",
      " |  query_catalog_async(self, catalog, cache=True, get_query_payload=False)\n",
      " |      Serves the same function as `query_catalog`, but\n",
      " |      only collects the response from the Simbad server and returns.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      catalog : str\n",
      " |          the name of the catalog.\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      response : `requests.Response`\n",
      " |           Response of the query from the server.\n",
      " |  \n",
      " |  query_criteria(self, *args, **kwargs)\n",
      " |      Query SIMBAD based on any criteria.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      args:\n",
      " |          String arguments passed directly to SIMBAD's script\n",
      " |          (e.g., 'region(box, GAL, 10.5 -10.5, 0.5d 0.5d)')\n",
      " |      kwargs:\n",
      " |          Keyword / value pairs passed to SIMBAD's script engine\n",
      " |          (e.g., {'otype':'SNR'} will be rendered as otype=SNR)\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      table : `~astropy.table.Table`\n",
      " |          Query results table\n",
      " |  \n",
      " |  query_criteria_async(self, *args, **kwargs)\n",
      " |      Query SIMBAD based on any criteria.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      args:\n",
      " |          String arguments passed directly to SIMBAD's script\n",
      " |          (e.g., 'region(box, GAL, 10.5 -10.5, 0.5d 0.5d)')\n",
      " |      kwargs:\n",
      " |          Keyword / value pairs passed to SIMBAD's script engine\n",
      " |          (e.g., {'otype':'SNR'} will be rendered as otype=SNR)\n",
      " |      cache : bool\n",
      " |          Cache the query?\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      response : `requests.Response`\n",
      " |          Response of the query from the server\n",
      " |  \n",
      " |  query_object(self, object_name, wildcard=False, verbose=False, get_query_payload=False)\n",
      " |      Queries Simbad for the given object and returns the result as a\n",
      " |      `~astropy.table.Table`. Object names may also be specified with\n",
      " |      wildcard.  See examples below.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      object_name : str\n",
      " |          name of object to be queried\n",
      " |      wildcard : boolean, optional\n",
      " |          When it is set to `True` it implies that the object is specified\n",
      " |          with wildcards. Defaults to `False`.\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      table : `~astropy.table.Table`\n",
      " |          Query results table\n",
      " |  \n",
      " |  query_object_async(self, object_name, wildcard=False, cache=True, get_query_payload=False)\n",
      " |      Serves the same function as `query_object`, but\n",
      " |      only collects the response from the Simbad server and returns.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      object_name : str\n",
      " |          name of object to be queried\n",
      " |      wildcard : boolean, optional\n",
      " |          When it is set to `True` it implies that the object is specified\n",
      " |          with wildcards. Defaults to `False`.\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      response : `requests.Response`\n",
      " |          Response of the query from the server\n",
      " |  \n",
      " |  query_objectids(self, object_name, verbose=False, cache=True, get_query_payload=False)\n",
      " |      Query Simbad with an object name, and return a table of all\n",
      " |      names associated with that object in a `~astropy.table.Table`.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      object_name : str\n",
      " |          name of object to be queried\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      table : `~astropy.table.Table`\n",
      " |          Query results table\n",
      " |  \n",
      " |  query_objectids_async(self, object_name, cache=True, get_query_payload=False)\n",
      " |      Serves the same function as `query_objectids`, but\n",
      " |      only collects the response from the Simbad server and returns.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      object_name : str\n",
      " |          name of object to be queried\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      response : `requests.Response`\n",
      " |           Response of the query from the server.\n",
      " |  \n",
      " |  query_objects(self, object_names, wildcard=False, verbose=False, get_query_payload=False)\n",
      " |      Queries Simbad for the specified list of objects and returns the\n",
      " |      results as a `~astropy.table.Table`. Object names may be specified\n",
      " |      with wildcards if desired.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      object_names : sequence of strs\n",
      " |          names of objects to be queried\n",
      " |      wildcard : boolean, optional\n",
      " |          When `True`, the names may have wildcards in them. Defaults to\n",
      " |          `False`.\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      table : `~astropy.table.Table`\n",
      " |          Query results table\n",
      " |  \n",
      " |  query_objects_async(self, object_names, wildcard=False, cache=True, get_query_payload=False)\n",
      " |      Same as `query_objects`, but only collects the response from the\n",
      " |      Simbad server and returns.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      object_names : sequence of strs\n",
      " |          names of objects to be queried\n",
      " |      wildcard : boolean, optional\n",
      " |          When `True`, the names may have wildcards in them. Defaults to\n",
      " |          `False`.\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      response : `requests.Response`\n",
      " |          Response of the query from the server\n",
      " |  \n",
      " |  query_region(self, *args, **kwargs)\n",
      " |      Queries the service and returns a table object.\n",
      " |      \n",
      " |      Serves the same function as `query_region`, but\n",
      " |      only collects the response from the Simbad server and returns.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      coordinates : str or `astropy.coordinates` object\n",
      " |          the identifier or coordinates around which to query.\n",
      " |      radius : str or `~astropy.units.Quantity`, optional\n",
      " |          the radius of the region. If missing, set to default\n",
      " |          value of 2 arcmin.\n",
      " |      equinox : float, optional\n",
      " |          the equinox of the coordinates. If missing set to\n",
      " |          default 2000.0.\n",
      " |      epoch : str, optional\n",
      " |          the epoch of the input coordinates. Must be specified as\n",
      " |          [J|B] <epoch>. If missing, set to default J2000.\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      table : A `~astropy.table.Table` object.\n",
      " |  \n",
      " |  query_region_async(self, coordinates, radius=<Quantity 2. arcmin>, equinox=2000.0, epoch='J2000', cache=True, get_query_payload=False)\n",
      " |      Serves the same function as `query_region`, but\n",
      " |      only collects the response from the Simbad server and returns.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      coordinates : str or `astropy.coordinates` object\n",
      " |          the identifier or coordinates around which to query.\n",
      " |      radius : str or `~astropy.units.Quantity`, optional\n",
      " |          the radius of the region. If missing, set to default\n",
      " |          value of 2 arcmin.\n",
      " |      equinox : float, optional\n",
      " |          the equinox of the coordinates. If missing set to\n",
      " |          default 2000.0.\n",
      " |      epoch : str, optional\n",
      " |          the epoch of the input coordinates. Must be specified as\n",
      " |          [J|B] <epoch>. If missing, set to default J2000.\n",
      " |      get_query_payload : bool, optional\n",
      " |          When set to `True` the method returns the HTTP request parameters.\n",
      " |          Defaults to `False`.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      response : `requests.Response`\n",
      " |           Response of the query from the server.\n",
      " |  \n",
      " |  remove_votable_fields(self, *args, **kwargs)\n",
      " |      Removes the specified field names from ``SimbadClass._VOTABLE_FIELDS``\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      list of field_names to be removed\n",
      " |      strip_params: bool\n",
      " |          If true, strip the specified keywords before removing them:\n",
      " |          e.g., ra(foo) would remove ra(bar) if this is True\n",
      " |  \n",
      " |  reset_votable_fields(self)\n",
      " |      resets VOTABLE_FIELDS to defaults\n",
      " |  \n",
      " |  ----------------------------------------------------------------------\n",
      " |  Data and other attributes defined here:\n",
      " |  \n",
      " |  ROW_LIMIT = 0\n",
      " |  \n",
      " |  SIMBAD_URL = 'http://simbad.u-strasbg.fr/simbad/sim-script'\n",
      " |  \n",
      " |  TIMEOUT = 60\n",
      " |  \n",
      " |  WILDCARDS = {'*': 'Any string of characters (including an empty one)',...\n",
      " |  \n",
      " |  __abstractmethods__ = frozenset()\n",
      " |  \n",
      " |  ----------------------------------------------------------------------\n",
      " |  Methods inherited from astroquery.query.BaseQuery:\n",
      " |  \n",
      " |  __call__(self, *args, **kwargs)\n",
      " |      init a fresh copy of self\n",
      " |  \n",
      " |  ----------------------------------------------------------------------\n",
      " |  Data descriptors inherited from astroquery.query.BaseQuery:\n",
      " |  \n",
      " |  __dict__\n",
      " |      dictionary for instance variables (if defined)\n",
      " |  \n",
      " |  __weakref__\n",
      " |      list of weak references to the object (if defined)\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(Simbad)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "9b5a4508",
   "metadata": {},
   "source": [
    "Feel free to explore these methods. But in the next cell, let's print the results of `list_votable_fields`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "27b9aed4",
   "metadata": {
    "scrolled": true,
    "tags": [
     "output_scroll"
    ]
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "--NOTES--\n",
      "\n",
      "1. The parameter filtername must correspond to an existing filter. Filters include: B,V,R,I,J,K.  They are checked by SIMBAD but not astroquery.simbad\n",
      "\n",
      "2. Fields beginning with rvz display the data as it is in the database. Fields beginning with rv force the display as a radial velocity. Fields beginning with z force the display as a redshift\n",
      "\n",
      "3. For each measurement catalog, the VOTable contains all fields of the first measurement. When applicable, the first measurement is the mean one. \n",
      "\n",
      "Available VOTABLE fields:\n",
      "\n",
      "bibcodelist(y1-y2)\n",
      "biblio\n",
      "cel\n",
      "cl.g\n",
      "coo(opt)\n",
      "coo_bibcode\n",
      "coo_err_angle\n",
      "coo_err_maja\n",
      "coo_err_mina\n",
      "coo_qual\n",
      "coo_wavelength\n",
      "coordinates\n",
      "dec(opt)\n",
      "dec_prec\n",
      "diameter\n",
      "dim\n",
      "dim_angle\n",
      "dim_bibcode\n",
      "dim_incl\n",
      "dim_majaxis\n",
      "dim_minaxis\n",
      "dim_qual\n",
      "dim_wavelength\n",
      "dimensions\n",
      "distance\n",
      "distance_result\n",
      "einstein\n",
      "fe_h\n",
      "flux(filtername)\n",
      "flux_bibcode(filtername)\n",
      "flux_error(filtername)\n",
      "flux_name(filtername)\n",
      "flux_qual(filtername)\n",
      "flux_system(filtername)\n",
      "flux_unit(filtername)\n",
      "fluxdata(filtername)\n",
      "gcrv\n",
      "gen\n",
      "gj\n",
      "hbet\n",
      "hbet1\n",
      "hgam\n",
      "id(opt)\n",
      "ids\n",
      "iras\n",
      "irc\n",
      "iso\n",
      "iue\n",
      "jp11\n",
      "link_bibcode\n",
      "main_id\n",
      "measurements\n",
      "membership\n",
      "mesplx\n",
      "mespm\n",
      "mk\n",
      "morphtype\n",
      "mt\n",
      "mt_bibcode\n",
      "mt_qual\n",
      "otype\n",
      "otype(opt)\n",
      "otypes\n",
      "parallax\n",
      "plx\n",
      "plx_bibcode\n",
      "plx_error\n",
      "plx_prec\n",
      "plx_qual\n",
      "pm\n",
      "pm_bibcode\n",
      "pm_err_angle\n",
      "pm_err_maja\n",
      "pm_err_mina\n",
      "pm_qual\n",
      "pmdec\n",
      "pmdec_prec\n",
      "pmra\n",
      "pmra_prec\n",
      "pos\n",
      "posa\n",
      "propermotions\n",
      "ra(opt)\n",
      "ra_prec\n",
      "rot\n",
      "rv_value\n",
      "rvz_bibcode\n",
      "rvz_error\n",
      "rvz_qual\n",
      "rvz_radvel\n",
      "rvz_type\n",
      "rvz_wavelength\n",
      "sao\n",
      "sp\n",
      "sp_bibcode\n",
      "sp_nature\n",
      "sp_qual\n",
      "sptype\n",
      "td1\n",
      "typed_id\n",
      "ubv\n",
      "uvby\n",
      "uvby1\n",
      "v*\n",
      "velocity\n",
      "xmm\n",
      "z_value\n",
      "For more information on a field:\n",
      "Simbad.get_field_description ('field_name') \n",
      "Currently active VOTABLE fields:\n",
      " ['main_id', 'coordinates']\n",
      "None\n"
     ]
    }
   ],
   "source": [
    "print(Simbad.list_votable_fields())"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "6d515ef1",
   "metadata": {},
   "source": [
    "We get a list of the available fields we could query to obtain in a table. If we are uncertain about the meaning of a field, we can get a description with `Simbad.get_field_description('field_name')`.\n",
    "\n",
    "Scrolling the output of the cell above we also learn that the currently active fields are the main_id and the coordinates. If we want more information, we need to request it specifically. We can do so by running `Simbad.add_votable_fields('field_name')` before querying the object:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "800d0890",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "all bibcodes of an astronomical object separated with a ipipe\n"
     ]
    }
   ],
   "source": [
    "Simbad.get_field_description(\"biblio\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "5d99af87",
   "metadata": {
    "tags": [
     "output_scroll"
    ]
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div><i>Table length=1</i>\n",
       "<table id=\"table139801776530832\" class=\"table-striped table-bordered table-condensed\">\n",
       "<thead><tr><th>MAIN_ID</th><th>RA</th><th>DEC</th><th>RA_PREC</th><th>DEC_PREC</th><th>COO_ERR_MAJA</th><th>COO_ERR_MINA</th><th>COO_ERR_ANGLE</th><th>COO_QUAL</th><th>COO_WAVELENGTH</th><th>COO_BIBCODE</th><th>OTYPE</th><th>OTYPES</th><th>GALDIM_MAJAXIS</th><th>GALDIM_MINAXIS</th><th>GALDIM_ANGLE</th><th>GALDIM_BIBCODE</th><th>BIBLIO</th><th>SCRIPT_NUMBER_ID</th></tr></thead>\n",
       "<thead><tr><th></th><th>&quot;h:m:s&quot;</th><th>&quot;d:m:s&quot;</th><th></th><th></th><th>mas</th><th>mas</th><th>deg</th><th></th><th></th><th></th><th></th><th></th><th>arcmin</th><th>arcmin</th><th>deg</th><th></th><th></th><th></th></tr></thead>\n",
       "<thead><tr><th>object</th><th>str13</th><th>str13</th><th>int16</th><th>int16</th><th>float32</th><th>float32</th><th>int16</th><th>str1</th><th>str1</th><th>object</th><th>object</th><th>object</th><th>float32</th><th>float32</th><th>int16</th><th>object</th><th>object</th><th>int32</th></tr></thead>\n",
       "<tr><td>NGC  4038</td><td>12 01 53.002</td><td>-18 52 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       "</table></div>"
      ],
      "text/plain": [
       "<Table length=1>\n",
       " MAIN_ID       RA      ... SCRIPT_NUMBER_ID\n",
       "            \"h:m:s\"    ...                 \n",
       "  object     str13     ...      int32      \n",
       "--------- ------------ ... ----------------\n",
       "NGC  4038 12 01 53.002 ...                1"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "Simbad.reset_votable_fields()\n",
    "Simbad.add_votable_fields(\"otype\", \"otypes\", \"dim\", \"dim_bibcode\", \"biblio\")\n",
    "info_simbad = Simbad.query_object(\"NGC4038\")\n",
    "info_simbad"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "e14c3821",
   "metadata": {},
   "source": [
    "We now know the main object type of NGC4038: \"Emission line Galaxy\" `EmG`. We can also read the object dimensions (major axis `GALDIM_MAJAXIS`, minor axis `GALDIM_MINAXIS`, inclination angle `GALDIM_ANGLE`), and the related bibliographic reference.\n",
    "We can also see the full list of object types attributed to NGC4038 (ex: `HI` HI (21cm) Source, `G` Galaxy, `GiP` Galaxy in Pair, `Rad` Radio Source...). This comes from the fact that an object can have a lot of descriptions, a galaxy can very well also be a radio source. The descriptions and relations between object types can be explored on [Simbad's webpages](https://simbad.cds.unistra.fr/guide/otypes.htx).\n",
    "\n",
    "As we saw that NGC4038 is a galaxy in a pair, let's search for its linked object: we query sources in a circle of 2 arcmin around NGC4038 of the same object type to find the other galaxy of the pair; then we query sources in the same area with 100% membership probability. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "ecf42ee9",
   "metadata": {
    "scrolled": true,
    "tags": [
     "output_scroll"
    ]
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div><i>Table length=2</i>\n",
       "<table id=\"table139801777571296\" class=\"table-striped table-bordered table-condensed\">\n",
       "<thead><tr><th>MAIN_ID</th><th>RA</th><th>DEC</th><th>RA_PREC</th><th>DEC_PREC</th><th>COO_ERR_MAJA</th><th>COO_ERR_MINA</th><th>COO_ERR_ANGLE</th><th>COO_QUAL</th><th>COO_WAVELENGTH</th><th>COO_BIBCODE</th><th>OTYPE</th><th>OTYPES</th><th>GALDIM_MAJAXIS</th><th>GALDIM_MINAXIS</th><th>GALDIM_ANGLE</th><th>GALDIM_BIBCODE</th><th>BIBLIO</th><th>SCRIPT_NUMBER_ID</th></tr></thead>\n",
       "<thead><tr><th></th><th>&quot;h:m:s&quot;</th><th>&quot;d:m:s&quot;</th><th></th><th></th><th>mas</th><th>mas</th><th>deg</th><th></th><th></th><th></th><th></th><th></th><th>arcmin</th><th>arcmin</th><th>deg</th><th></th><th></th><th></th></tr></thead>\n",
       "<thead><tr><th>object</th><th>str13</th><th>str13</th><th>int16</th><th>int16</th><th>float32</th><th>float32</th><th>int16</th><th>str1</th><th>str1</th><th>object</th><th>object</th><th>object</th><th>float32</th><th>float32</th><th>int16</th><th>object</th><th>object</th><th>int32</th></tr></thead>\n",
       "<tr><td>NGC  4038</td><td>12 01 53.002</td><td>-18 52 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       "</table></div>"
      ],
      "text/plain": [
       "<Table length=2>\n",
       " MAIN_ID       RA      ... SCRIPT_NUMBER_ID\n",
       "            \"h:m:s\"    ...                 \n",
       "  object     str13     ...      int32      \n",
       "--------- ------------ ... ----------------\n",
       "NGC  4038 12 01 53.002 ...                0\n",
       "NGC  4039  12 01 53.51 ...                0"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "siblings = Simbad.query_criteria(\"region(circle, NGC4038, 2m)\", otype=\"GiP\")\n",
    "siblings"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "39549929",
   "metadata": {
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     "output_scroll"
    ]
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div><i>Table length=4</i>\n",
       "<table id=\"table139802863988464\" class=\"table-striped table-bordered table-condensed\">\n",
       "<thead><tr><th>MAIN_ID</th><th>RA</th><th>DEC</th><th>RA_PREC</th><th>DEC_PREC</th><th>COO_ERR_MAJA</th><th>COO_ERR_MINA</th><th>COO_ERR_ANGLE</th><th>COO_QUAL</th><th>COO_WAVELENGTH</th><th>COO_BIBCODE</th><th>OTYPE</th><th>OTYPES</th><th>GALDIM_MAJAXIS</th><th>GALDIM_MINAXIS</th><th>GALDIM_ANGLE</th><th>GALDIM_BIBCODE</th><th>BIBLIO</th><th>SCRIPT_NUMBER_ID</th></tr></thead>\n",
       "<thead><tr><th></th><th>&quot;h:m:s&quot;</th><th>&quot;d:m:s&quot;</th><th></th><th></th><th>mas</th><th>mas</th><th>deg</th><th></th><th></th><th></th><th></th><th></th><th>arcmin</th><th>arcmin</th><th>deg</th><th></th><th></th><th></th></tr></thead>\n",
       "<thead><tr><th>object</th><th>str13</th><th>str13</th><th>int16</th><th>int16</th><th>float32</th><th>float32</th><th>int16</th><th>str1</th><th>str1</th><th>object</th><th>object</th><th>object</th><th>float32</th><th>float32</th><th>int16</th><th>object</th><th>object</th><th>int32</th></tr></thead>\n",
       "<tr><td>NAME Antennae</td><td>12 01 53.170</td><td>-18 52 37.92</td><td>7</td><td>7</td><td>--</td><td>--</td><td>0</td><td>C</td><td>I</td><td>2006AJ....131.1163S</td><td>InteractingG</td><td>GiG|G|IG|IR|PaG|Rad|UV|X</td><td>--</td><td>--</td><td>0</td><td></td><td>2023A&amp;A...672A.191C|2023A&amp;A...678A..26C|2023AJ....165...66F|2023AJ....165..240G|2023ApJ...942L..13L|2023ApJ...943..132L|2023ApJ...943..142C|2023ApJ...944L..14W|2023ApJ...944L..15S|2023ApJ...944L..55L|2023ApJ...945...42B|2023ApJ...946....1C|2023ApJ...947...31H|2023ApJ...949...83H|2023ApJ...949..116C|2023ApJ...950...56H|2023ApJ...952....4B|2023ApJ...956L...7L|2023MNRAS.519.1366G|2023MNRAS.519.4826A|2023MNRAS.519.5128N|2023MNRAS.520.2180C|2023MNRAS.521.1646W|2023MNRAS.522.1377S|2023PASP..135b4101A|2023PASP..135e4101P|2022A&amp;A...658A..54C|2022A&amp;A...659A..14P|2022A&amp;A...660A..60F|2022A&amp;A...661A.136G|2022A&amp;A...662A..87O|2022A&amp;A...665A.137S|2022A&amp;A...666A..29D|2022A&amp;A...667A...5R|2022A&amp;A...667A..11C|2022A&amp;A...667A..35R|2022AJ....163...14B|2022ApJ...927..166P|2022ApJ...928...15W|2022ApJ...928...57H|2022ApJ...928..169F|2022ApJ...929..154S|2022ApJ...930..146W|2022ApJ...931..121A|2022ApJ...932...15A|2022ApJ...932...27B|2022ApJ...932...47W|2022ApJ...934..115B|2022ApJ...934L...8J|2022ApJ...936...92L|2022ApJ...937..120W|2022MNRAS.509.5938H|2022MNRAS.510.2724O|2022MNRAS.510.4819S|2022MNRAS.512..661K|2022MNRAS.513..129B|2022MNRAS.514..265L|2022MNRAS.514.4560L|2022MNRAS.515.2928B|2022MNRAS.515.3555P|2022MNRAS.516.1462T|2022MNRAS.516.3532M|2022MNRAS.516.4066L|2022MNRAS.516.4194K|2022MNRAS.517.1313M|2022MNRAS.517.4175Y|2022MNRAS.517L.126S|2022PASJ...74..343K|2021A&amp;A...645A..45C|2021A&amp;A...646A.122B|2021A&amp;A...647A.138V|2021A&amp;A...649A.137P|2021A&amp;A...650A.103D|2021A&amp;A...653A..47M|2021AJ....161...93D|2021ApJ...908...30K|2021ApJ...908..121E|2021ApJ...908L..31O|2021ApJ...909...56L|2021ApJ...910..104I|2021ApJ...911..104K|2021ApJ...912....4L|2021ApJ...912...31H|2021ApJ...914..121A|2021ApJ...917...13S|2021ApJ...917...36K|2021ApJ...920..105C|2021ApJ...922...86L|2021ApJ...923..278L|2021ApJS..257...35C|2021ApJS..257...57U|2021MNRAS.500.2076G|2021MNRAS.500.4422C|2021MNRAS.500.4730B|2021MNRAS.502.2238M|2021MNRAS.502.5185M|2021MNRAS.502L..79I|2021MNRAS.503..106B|2021MNRAS.503.2168P|2021MNRAS.503.2187C|2021MNRAS.503.2622C|2021MNRAS.503.3113M|2021MNRAS.503.6170B|2021MNRAS.506.1777M|2021MNRAS.506.1896K|2021MNRAS.506.4841T|2021MNRAS.507.5542M|2021MNRAS.508.3672P|2021PASJ...73..417T|2020A&amp;A...634L...1B|2020A&amp;A...639A..30M|2020AJ....159..167L|2020AJ....159..180K|2020ApJ...889..154W|2020ApJ...890...18M|2020ApJ...890..149T|2020ApJ...890..150C|2020ApJ...891....2L|2020ApJ...893..135M|2020ApJ...895...85M|2020ApJ...898..110N|2020ApJ...900..124B|2020ApJ...901L..20B|2020ApJ...903...50E|2020ApJ...904..164N|2020MNRAS.492..993C|2020MNRAS.493.5653Z|2020MNRAS.495.1073D|2020MNRAS.496...36P|2020MNRAS.496.5243H|2020MNRAS.496L...1D|2020MNRAS.497.3591S|2020MNRAS.497.3860G|2020MNRAS.499.3267A|2019A&amp;A...621A.104R|2019A&amp;A...624A.138Y|2019A&amp;A...625A..65R|2019AJ....157..131B|2019AJ....158..169S|2019ApJ...870...80L|2019ApJ...871...37H|2019ApJ...871..115Z|2019ApJ...871..122J|2019ApJ...872...93M|2019ApJ...872..148C|2019ApJ...874..120F|2019ApJ...876..130H|2019ApJ...877....7W|2019ApJ...877..135N|2019ApJ...878..161J|2019ApJ...879...41K|2019ApJ...880..127J|2019ApJ...881..119P|2019ApJ...882...31A|2019ApJ...882...34F|2019ApJ...883..102K|2019ApJ...885..107N|2019MNRAS.483..711A|2019MNRAS.483.3618V|2019MNRAS.483.4291C|2019MNRAS.483.4707G|2019MNRAS.484.5009E|2019MNRAS.485.3588K|2019MNRAS.485.4997D|2019MNRAS.486.2604Z|2019MNRAS.487.3183M|2019MNRAS.487.4238M|2019MNRAS.487.4550P|2019MNRAS.488.3972T|2019MNRAS.488.5400N|2019MNRAS.489..708L|2019MNRAS.489.2746U|2019MNRAS.490.1714P|2019MNRAS.490.2139R|2019MNRAS.490.4804C|2019NatAs...3..822M|2019NatAs...3.1115D|2018A&amp;A...611A..95W|2018A&amp;A...614A..32W|2018A&amp;A...615A..33M|2018A&amp;A...618A..81T|2018AJ....155...17C|2018AJ....155...81S|2018AJ....156...21H|2018AJ....156..166P|2018AJ....156..215L|2018ApJ...853...88E|2018ApJ...853..125J|2018ApJ...858...16G|2018ApJ...860...90V|2018ApJ...860..169K|2018ApJ...860..172S|2018ApJ...861...94H|2018ApJ...861..107L|2018ApJ...862..120K|2018ApJ...862..147M|2018ApJ...863...43W|2018ApJ...863..171S|2018ApJ...864...38L|2018ApJ...866...77E|2018ApJ...868...16H|2018ApJ...868...75S|2018ApJ...869..119E|2018ApJ...869L..38T|2018ApJS..234...35Z|2018ApJS..237...36P|2018MNRAS.473..585R|2018MNRAS.473..996M|2018MNRAS.473.5015A|2018MNRAS.474..580P|2018MNRAS.475.3934L|2018MNRAS.477.1683M|2018MNRAS.477.5001G|2018MNRAS.478.4142T|2018MNRAS.480.3257M|2018MNRAS.481.1016G|2018PASP..130g2001G|2017A&amp;A...597A..28B|2017A&amp;A...597A..41G|2017A&amp;A...600A.139H|2017A&amp;A...602A.112D|2017A&amp;A...604A...2S|2017A&amp;A...605A..81D|2017A&amp;A...606A..86C|2017A&amp;A...606A..95C|2017A&amp;A...608A..53J|2017A&amp;A...608A.144Y|2017AJ....154..211K|2017ApJ...835...60W|2017ApJ...835..174S|2017ApJ...835..223S|2017ApJ...836...74J|201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       "<tr><td>[CEB2007] Cluster 3</td><td>12 01 54.56</td><td>-18 53 04.0</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td></td><td>2007ApJ...658..319C</td><td>Cluster*</td><td>NIR|Cl*|Cl*</td><td>--</td><td>--</td><td>0</td><td></td><td>2010ApJ...710.1746G|2007ApJ...658..319C</td><td>0</td></tr>\n",
       "<tr><td>NGC  4038</td><td>12 01 53.002</td><td>-18 52 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995A&amp;AS..114...21N|1995AGAb...11...50F|1995AJ....109..960W|1995AJ....109.2318C|1995AJ....110..116K|1995AJ....110..129K|1995AJ....110.1009B|1995ApJ...450...27V|1995ApJ...450..547L|1995ApJ...453..616S|1995ApJ...454L..73W|1995ApJS...96..461B|1995ApJS...98..219Y|1995ApJS..100..325L|1995ApL....30....1R|1995BAAS...27..835N|1995BAAS...27..868M|1995BASI...23..135J|1995MNRAS.276...57C|1995MNRAS.276.1373S|1995MNRAS.277..397R|1995MNRAS.277..641M|1995MNSSA..54...72.|1995Natur.374..215V|1995Natur.375..742M|1995PASP..107..715I|1995PAZh...21..730Z|1994A&amp;A...289...83D|1994A&amp;A...289..715D|1994AJ....108..837S|1994Ap&amp;SS.219...77S|1994ApJ...427..112M|1994ApJ...427..202G|1994ApJ...427..696M|1994ApJS...90..179G|1994BAAS...26.1488W|1994BAAS...26.1511H|1994MNRAS.269..928S|1994PASJ...46L.195Y|1993A&amp;A...269....7B|1993A&amp;A...274..730H|1993A&amp;A...275..390G|1993A&amp;AS..100...47G|1993AJ....105..864S|1993Afz....36..435R|1993ApJ...407..448Z|1993ApJ...410..574L|1993ApJ...412...90E|1993ApJ...418...82M|1993ApJS...89....1R|1993C&amp;E...279...24A|1993JBAA..103...84M|1993Mercu..22b..44K|1993S&amp;W....32..189B|1992A&amp;A...255...69G|1992A&amp;A...256L..19M|1992A&amp;A...266..106A|1992A&amp;AS...93..211F|1992AGAb....7..179B|1992AJ....103..728B|1992AJ....103.1734C|1992ARA&amp;A..30..705B|1992ApJ...387..152J|1992ApJ...388...82D|1992ApJS...79..213B|1992ApJS...80..531F|1992ApJS...80..645K|1992Natur.360..105H|1992Natur.360..715B|1992QJRAS..33..321M|1991A&amp;A...243..367M|1991A&amp;A...249..323A|1991A&amp;A...251..442H|1991ARA&amp;A..29..581Y|1991ApJ...366L...1S|1991ApJ...366L...5S|1991ApJ...377...72M|1991ApJ...378...39S|1991Ast....19j..74E|1991BAAS...23.1401M|1991MNRAS.250..392G|1991MNRAS.251..360N|1990A&amp;A...233..317F|1990A&amp;A...234...84G|1990A&amp;A...239...50K|1990AZh....67..472S|1990ApJ...349..492S|1990ApJ...354..418S|1990ApJ...359...72B|1990ApJ...362..455S|1990ApJS...73..359C|1990ApJS...74..675B|1990BAAS...22..811M|1990JAF....37R..15A|1990MNRAS.247..444G|1990Rech...21.1100M|1989A&amp;A...225...27V|1989A&amp;A...226...23B|1989A&amp;AS...81..421B|1989AJ.....97..995C|1989AJ.....97.1576M|1989AJ.....98..766S|1989ApJ...336..421W|1989ApJ...338..707Y|1989ApJ...340L..53M|1989ApJ...342...83S|1989ApJ...345..752E|1989ApJ...346L..73M|1989ApJS...70..699Y|1989ESOLV.C......0L|1989LAstr.103..387M|1989MNRAS.236..737E|1989MNRAS.237..673N|1988A&amp;A...192...81J|1988A&amp;A...195...76B|1988A&amp;A...197...52F|1988A&amp;A...202...41K|1988A&amp;A...203..278M|1988A&amp;A...205...71P|1988A&amp;A...206..219R|1988A&amp;A...206L..20M|1988AJ.....96.1227H|1988ApJ...331..699B|1988ApJ...335...74B|1988ApJS...68...91R|1988BAAS...20..733B|1988LAstr.102...11C|1988MNRAS.233....1W|1988MNRAS.234..193M|1988MNRAS.234..247S|1988S&amp;W....27..583J|1988Sci...242.1264G|1987A&amp;A...176....1B|1987A&amp;AS...70..281B|1987AJ.....93.1011K|1987AJ.....93.1484M|1987ApJ...314....3E|1987ApJ...315...28H|1987ApJ...318..645T|1987ApJ...320...49B|1987ApJ...320..238S|1987ApJ...321L..35K|1987ApJ...323...44V|1987ApJS...65..485C|1987IAUS..121...65K|1987MNRAS.229...15S|1987Natur.328..382D|1987NewSc.113...46P|1987PASP...99..915H|1987PhR...148..309A|1987RvPD...15...38C|1987SciAm.257j.137H|1986A&amp;A...155..151H|1986A&amp;A...155..193H|1986A&amp;A...165..300R|1986A&amp;AS...66..335V|1986ApJ...311L..17Y|1986IAUS..116..355R|1986JAVSO..15...25S|1985A&amp;A...149..475B|1985A&amp;AS...60..261G|1985AJ.....90..708K|1985ApJ...298L..31S|1985ApJS...57..261V|1985ApJS...57..643D|1985MAUTx...4....1C|1984A&amp;AS...56..381B|1984A&amp;AS...58..665V|1984A&amp;AS...58..735B|1984ARA&amp;A..22..445H|1984ApJ...276...60S|1984ApJ...287...95L|1984BAAS...16..539M|1984BAAS...16..960J|1984MNRAS.209..111J|1983AJ.....88..296H|1983ApJ...266L...5F|1983ApJ...268..628H|1983ApJS...53..459C|1982A&amp;A...109..331H|1982AJ.....87.1341H|1982ApJ...256..397F|1981AJ.....86.1175V|1980A&amp;AS...41..189R|1979PAZh....5..120M|1979SvAL....5...66M|1978A&amp;A....70L..41B|1978IAUS...77..269V|1978IAUS...77..279S|1977A&amp;AS...28....1V|1977AuJPA..44....1S|1975A&amp;A....41..477H|1974MNRAS.167..251W|1974VeARI..26....0B|1973A&amp;A....28..379B|1972ApJ...178..623T|1972MNRAS.157..309W|1971MNRAS.152..403C|1971MNRAS.152..429C|1970ApJ...160..801R|1968AnAp...31..387D|1967ApJ...150....1D|1966ApJ...145..661B|1966ApJS...14....1A|1966PASP...78..262D|1960ApJ...131..215V|1959IAUS....9..514B|1958AZh....35..858V|1958PASP...70..143M|1923ApJ....57..137D</td><td>0</td></tr>\n",
       "</table></div>"
      ],
      "text/plain": [
       "<Table length=4>\n",
       "      MAIN_ID            RA      ... SCRIPT_NUMBER_ID\n",
       "                      \"h:m:s\"    ...                 \n",
       "       object          str13     ...      int32      \n",
       "------------------- ------------ ... ----------------\n",
       "      NAME Antennae 12 01 53.170 ...                0\n",
       "[CEB2007] Cluster 3  12 01 54.56 ...                0\n",
       "          NGC  4038 12 01 53.002 ...                0\n",
       "          NGC  4039  12 01 53.51 ...                0"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "members = Simbad.query_criteria(\"region(circle, NGC4038, 2m)\", membership=100)\n",
    "members"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "8fd74788",
   "metadata": {},
   "source": [
    "You can learn more on the features of the Simbad python module here: https://astroquery.readthedocs.io/en/latest/simbad/simbad.html\n",
    "\n",
    "and on the Simbad query criteria: http://simbad.cds.unistra.fr/simbad/sim-fsam"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "83dcdad2",
   "metadata": {},
   "source": [
    "## Step #2: Visualise the source on a sky map\n",
    "\n",
    "[![Aladin](https://custom-icon-badges.demolab.com/badge/Aladin-gray.svg?logo=aladin&logoColor=purple&logoWidth=20)](https://aladin.cds.unistra.fr/aladin.gml \"https://aladin.cds.unistra.fr/aladin.gml\")\n",
    "\n",
    "We now open the [Aladin Lite widget](https://github.com/cds-astro/ipyaladin \"https://github.com/cds-astro/ipyaladin\"). We set it first to **center** on the Antennae galaxies, have a **field of view** of 0.5 $^\\circ$ and show colour images from the Digitized Sky Survey ([DSS](https://archive.stsci.edu/cgi-bin/dss_form)). Typing `aladin` in the second line of code tells the notebook to display the widget. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "1aa25b5d",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "application/vnd.jupyter.widget-view+json": {
       "model_id": "2b66bae31c0547cb8a34d7dad1fa774e",
       "version_major": 2,
       "version_minor": 0
      },
      "text/plain": [
       "Aladin(fov=0.5, height=600.0, options=['allow_full_zoomout', 'coo_frame', 'fov', 'full_screen', 'log', 'overla…"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "aladin = Aladin(target=\"Antennae\", fov=0.5, survey=\"P/DSS2/color\", height=600)\n",
    "aladin"
   ]
  },
  {
   "attachments": {},
   "cell_type": "markdown",
   "id": "e9b90cc9",
   "metadata": {},
   "source": [
    "As with any Aladin Lite implementation, you can interact with this widget. Try to:\n",
    " - scroll with your mouse pointer on the image to zoom in and out,  \n",
    " - select other image surveys and manage the current view with <img src=\"Data/images/ipyaladin_layer.png\" width=\"30\">\n",
    " - look at another target using the search field <img src=\"Data/images/ipyaladin_search.png\" width=\"30\">\n",
    " - find more information on something with the target tool <img src=\"Data/images/target.png\" width=\"30\">\n",
    " - do a right click to discover more tools\n",
    "\n",
    "You can also directly change the properties of the variable `aladin`. For example, to focus on M101 instead of the Antennae galaxies:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "b554a762",
   "metadata": {},
   "outputs": [],
   "source": [
    "aladin.target = \"M101\""
   ]
  },
  {
   "cell_type": "markdown",
   "id": "497c34fe",
   "metadata": {},
   "source": [
    "Feel free to explore other targets and methods available for the Aladin widget."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "c79ed516",
   "metadata": {},
   "source": [
    "## Step #3: Find and visualize additional data\n",
    "\n",
    "[![Aladin](https://custom-icon-badges.demolab.com/badge/Aladin-gray.svg?logo=aladin&logoColor=purple&logoWidth=20)](https://aladin.cds.unistra.fr/aladin.gml \"https://aladin.cds.unistra.fr/aladin.gml\")\n",
    "[![Simbad](https://custom-icon-badges.demolab.com/badge/Simbad-gray.svg?logo=simbad&logoColor=lightblue&logoWidth=20)](https://simbad.u-strasbg.fr/simbad/ \"https://simbad.u-strasbg.fr/simbad/\")\n",
    "[![Vizier](https://custom-icon-badges.demolab.com/badge/Vizier-gray.svg?logo=vizier&logoColor=orange&logoWidth=20)](https://vizier.cds.unistra.fr/viz-bin/VizieR \"https://vizier.cds.unistra.fr/viz-bin/VizieR\")\n",
    "\n",
    "We want to look for data related to HII regions in these interacting galaxies. We make a query in <ins>Simbad</ins> for HII regions within 14 arcmins around the Antennae galaxies. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "5a32296b",
   "metadata": {
    "tags": [
     "output_scroll"
    ]
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div><i>Table length=317</i>\n",
       "<table id=\"table139801776531888\" class=\"table-striped table-bordered table-condensed\">\n",
       "<thead><tr><th>MAIN_ID</th><th>RA</th><th>DEC</th><th>RA_PREC</th><th>DEC_PREC</th><th>COO_ERR_MAJA</th><th>COO_ERR_MINA</th><th>COO_ERR_ANGLE</th><th>COO_QUAL</th><th>COO_WAVELENGTH</th><th>COO_BIBCODE</th><th>OTYPE</th><th>OTYPES</th><th>GALDIM_MAJAXIS</th><th>GALDIM_MINAXIS</th><th>GALDIM_ANGLE</th><th>GALDIM_BIBCODE</th><th>BIBLIO</th><th>SCRIPT_NUMBER_ID</th></tr></thead>\n",
       "<thead><tr><th></th><th>&quot;h:m:s&quot;</th><th>&quot;d:m:s&quot;</th><th></th><th></th><th>mas</th><th>mas</th><th>deg</th><th></th><th></th><th></th><th></th><th></th><th>arcmin</th><th>arcmin</th><th>deg</th><th></th><th></th><th></th></tr></thead>\n",
       "<thead><tr><th>object</th><th>str13</th><th>str13</th><th>int16</th><th>int16</th><th>float32</th><th>float32</th><th>int16</th><th>str1</th><th>str1</th><th>object</th><th>object</th><th>object</th><th>float32</th><th>float32</th><th>int16</th><th>object</th><th>object</th><th>int32</th></tr></thead>\n",
       "<tr><td>RX J120155.4-185209</td><td>12 01 55.4</td><td>-18 52 09</td><td>5</td><td>5</td><td>--</td><td>--</td><td>0</td><td>D</td><td></td><td></td><td>HIIReg</td><td>HII|X</td><td>--</td><td>--</td><td>0</td><td></td><td>1997ApJ...478..542F|1995MNRAS.277..397R</td><td>0</td></tr>\n",
       "<tr><td>RX J120150.8-185220</td><td>12 01 50.9</td><td>-18 52 20</td><td>5</td><td>5</td><td>--</td><td>--</td><td>0</td><td>D</td><td></td><td></td><td>HIIReg</td><td>HII|X</td><td>--</td><td>--</td><td>0</td><td></td><td>2000AJ....120..670N|1997ApJ...478..542F|1995MNRAS.277..397R</td><td>0</td></tr>\n",
       "<tr><td>[MDL92]    I</td><td>12 01 27.29</td><td>-19 00 54.7</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td></td><td>2004AJ....127..660S</td><td>HIIReg</td><td>HII|*|G</td><td>--</td><td>--</td><td>0</td><td></td><td>2004AJ....127..660S|2001AJ....122.2969H|1992A&amp;A...256L..19M</td><td>0</td></tr>\n",
       "<tr><td>[MDL92]   II</td><td>12 01 27.57</td><td>-19 01 01.6</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td></td><td>2004AJ....127..660S</td><td>HIIReg</td><td>HII|*|G</td><td>--</td><td>--</td><td>0</td><td></td><td>2004AJ....127..660S|2001AJ....122.2969H|1992A&amp;A...256L..19M</td><td>0</td></tr>\n",
       "<tr><td>[MDL92]  III</td><td>12 01 25.30</td><td>-19 00 40.3</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td></td><td>2004AJ....127..660S</td><td>HIIReg</td><td>HII|*|G</td><td>--</td><td>--</td><td>0</td><td></td><td>2004AJ....127..660S|2001AJ....122.2969H|1992A&amp;A...256L..19M</td><td>0</td></tr>\n",
       "<tr><td>[ZBF2015] Arp244   1</td><td>12 01 54.60</td><td>-18 53 03.1</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td>O</td><td>2014MNRAS.445.1412Z</td><td>HIIReg</td><td>HII|HII</td><td>0.0875</td><td>0.0875</td><td>90</td><td>2014MNRAS.445.1412Z</td><td>2015MNRAS.451.1307Z|2014MNRAS.445.1412Z</td><td>0</td></tr>\n",
       "<tr><td>[ZBF2015] Arp244   2</td><td>12 01 55.70</td><td>-18 52 42.1</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td>O</td><td>2014MNRAS.445.1412Z</td><td>HIIReg</td><td>HII|HII</td><td>0.079</td><td>0.079</td><td>90</td><td>2014MNRAS.445.1412Z</td><td>2015MNRAS.451.1307Z|2014MNRAS.445.1412Z</td><td>0</td></tr>\n",
       "<tr><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td></tr>\n",
       "<tr><td>[ZBF2015] Arp244 285</td><td>12 01 55.80</td><td>-18 52 09.2</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td>O</td><td>2014MNRAS.445.1412Z</td><td>HIIReg</td><td>HII|HII</td><td>0.0125</td><td>0.0125</td><td>90</td><td>2014MNRAS.445.1412Z</td><td>2015MNRAS.451.1307Z|2014MNRAS.445.1412Z</td><td>0</td></tr>\n",
       "<tr><td>[ZBF2015] Arp244 287</td><td>12 01 52.60</td><td>-18 52 15.9</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td>O</td><td>2014MNRAS.445.1412Z</td><td>HIIReg</td><td>HII|HII</td><td>0.0085</td><td>0.0085</td><td>90</td><td>2014MNRAS.445.1412Z</td><td>2015MNRAS.451.1307Z|2014MNRAS.445.1412Z</td><td>0</td></tr>\n",
       "<tr><td>[ZBF2015] Arp244 289</td><td>12 01 55.00</td><td>-18 52 47.9</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td>O</td><td>2014MNRAS.445.1412Z</td><td>HIIReg</td><td>HII|HII</td><td>0.0125</td><td>0.0125</td><td>90</td><td>2014MNRAS.445.1412Z</td><td>2015MNRAS.451.1307Z|2014MNRAS.445.1412Z</td><td>0</td></tr>\n",
       "<tr><td>[ZBF2015] Arp244 292</td><td>12 01 53.40</td><td>-18 53 05.6</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td>O</td><td>2014MNRAS.445.1412Z</td><td>HIIReg</td><td>HII|HII</td><td>0.0125</td><td>0.0125</td><td>90</td><td>2014MNRAS.445.1412Z</td><td>2015MNRAS.451.1307Z|2014MNRAS.445.1412Z</td><td>0</td></tr>\n",
       "<tr><td>[ZBF2015] Arp244 293</td><td>12 01 54.70</td><td>-18 52 57.1</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td>O</td><td>2014MNRAS.445.1412Z</td><td>HIIReg</td><td>HII|HII</td><td>0.0093</td><td>0.0093</td><td>90</td><td>2014MNRAS.445.1412Z</td><td>2015MNRAS.451.1307Z|2014MNRAS.445.1412Z</td><td>0</td></tr>\n",
       "<tr><td>[ZFB2014] HII 294</td><td>12 01 53.60</td><td>-18 51 49.0</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td>O</td><td>2014MNRAS.445.1412Z</td><td>HIIReg</td><td>HII|HII</td><td>0.0125</td><td>0.0125</td><td>90</td><td>2014MNRAS.445.1412Z</td><td>2014MNRAS.445.1412Z</td><td>0</td></tr>\n",
       "<tr><td>[ZBF2015] Arp244 295</td><td>12 01 54.80</td><td>-18 53 01.9</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td>O</td><td>2014MNRAS.445.1412Z</td><td>HIIReg</td><td>HII|HII</td><td>0.011</td><td>0.011</td><td>90</td><td>2014MNRAS.445.1412Z</td><td>2015MNRAS.451.1307Z|2014MNRAS.445.1412Z</td><td>0</td></tr>\n",
       "<tr><td>[ZBF2015] Arp244 300</td><td>12 01 54.70</td><td>-18 52 38.6</td><td>6</td><td>6</td><td>--</td><td>--</td><td>0</td><td>D</td><td>O</td><td>2014MNRAS.445.1412Z</td><td>HIIReg</td><td>HII|HII</td><td>0.0093</td><td>0.0093</td><td>90</td><td>2014MNRAS.445.1412Z</td><td>2015MNRAS.451.1307Z|2014MNRAS.445.1412Z</td><td>0</td></tr>\n",
       "</table></div>"
      ],
      "text/plain": [
       "<Table length=317>\n",
       "      MAIN_ID             RA         DEC     RA_PREC DEC_PREC COO_ERR_MAJA COO_ERR_MINA COO_ERR_ANGLE COO_QUAL ...     COO_BIBCODE     OTYPE   OTYPES GALDIM_MAJAXIS GALDIM_MINAXIS GALDIM_ANGLE    GALDIM_BIBCODE                              BIBLIO                           SCRIPT_NUMBER_ID\n",
       "                       \"h:m:s\"     \"d:m:s\"                        mas          mas           deg               ...                                        arcmin         arcmin         deg                                                                                                      \n",
       "       object           str13       str13     int16   int16     float32      float32        int16       str1   ...        object       object  object    float32        float32        int16            object                                  object                                int32      \n",
       "-------------------- ----------- ----------- ------- -------- ------------ ------------ ------------- -------- ... ------------------- ------ ------- -------------- -------------- ------------ ------------------- ----------------------------------------------------------- ----------------\n",
       " RX J120155.4-185209  12 01 55.4   -18 52 09       5        5           --           --             0        D ...                     HIIReg   HII|X             --             --            0                                         1997ApJ...478..542F|1995MNRAS.277..397R                0\n",
       " RX J120150.8-185220  12 01 50.9   -18 52 20       5        5           --           --             0        D ...                     HIIReg   HII|X             --             --            0                     2000AJ....120..670N|1997ApJ...478..542F|1995MNRAS.277..397R                0\n",
       "        [MDL92]    I 12 01 27.29 -19 00 54.7       6        6           --           --             0        D ... 2004AJ....127..660S HIIReg HII|*|G             --             --            0                     2004AJ....127..660S|2001AJ....122.2969H|1992A&A...256L..19M                0\n",
       "        [MDL92]   II 12 01 27.57 -19 01 01.6       6        6           --           --             0        D ... 2004AJ....127..660S HIIReg HII|*|G             --             --            0                     2004AJ....127..660S|2001AJ....122.2969H|1992A&A...256L..19M                0\n",
       "        [MDL92]  III 12 01 25.30 -19 00 40.3       6        6           --           --             0        D ... 2004AJ....127..660S HIIReg HII|*|G             --             --            0                     2004AJ....127..660S|2001AJ....122.2969H|1992A&A...256L..19M                0\n",
       "[ZBF2015] Arp244   1 12 01 54.60 -18 53 03.1       6        6           --           --             0        D ... 2014MNRAS.445.1412Z HIIReg HII|HII         0.0875         0.0875           90 2014MNRAS.445.1412Z                     2015MNRAS.451.1307Z|2014MNRAS.445.1412Z                0\n",
       "[ZBF2015] Arp244   2 12 01 55.70 -18 52 42.1       6        6           --           --             0        D ... 2014MNRAS.445.1412Z HIIReg HII|HII          0.079          0.079           90 2014MNRAS.445.1412Z                     2015MNRAS.451.1307Z|2014MNRAS.445.1412Z                0\n",
       "                 ...         ...         ...     ...      ...          ...          ...           ...      ... ...                 ...    ...     ...            ...            ...          ...                 ...                                                         ...              ...\n",
       "[ZBF2015] Arp244 285 12 01 55.80 -18 52 09.2       6        6           --           --             0        D ... 2014MNRAS.445.1412Z HIIReg HII|HII         0.0125         0.0125           90 2014MNRAS.445.1412Z                     2015MNRAS.451.1307Z|2014MNRAS.445.1412Z                0\n",
       "[ZBF2015] Arp244 287 12 01 52.60 -18 52 15.9       6        6           --           --             0        D ... 2014MNRAS.445.1412Z HIIReg HII|HII         0.0085         0.0085           90 2014MNRAS.445.1412Z                     2015MNRAS.451.1307Z|2014MNRAS.445.1412Z                0\n",
       "[ZBF2015] Arp244 289 12 01 55.00 -18 52 47.9       6        6           --           --             0        D ... 2014MNRAS.445.1412Z HIIReg HII|HII         0.0125         0.0125           90 2014MNRAS.445.1412Z                     2015MNRAS.451.1307Z|2014MNRAS.445.1412Z                0\n",
       "[ZBF2015] Arp244 292 12 01 53.40 -18 53 05.6       6        6           --           --             0        D ... 2014MNRAS.445.1412Z HIIReg HII|HII         0.0125         0.0125           90 2014MNRAS.445.1412Z                     2015MNRAS.451.1307Z|2014MNRAS.445.1412Z                0\n",
       "[ZBF2015] Arp244 293 12 01 54.70 -18 52 57.1       6        6           --           --             0        D ... 2014MNRAS.445.1412Z HIIReg HII|HII         0.0093         0.0093           90 2014MNRAS.445.1412Z                     2015MNRAS.451.1307Z|2014MNRAS.445.1412Z                0\n",
       "   [ZFB2014] HII 294 12 01 53.60 -18 51 49.0       6        6           --           --             0        D ... 2014MNRAS.445.1412Z HIIReg HII|HII         0.0125         0.0125           90 2014MNRAS.445.1412Z                                         2014MNRAS.445.1412Z                0\n",
       "[ZBF2015] Arp244 295 12 01 54.80 -18 53 01.9       6        6           --           --             0        D ... 2014MNRAS.445.1412Z HIIReg HII|HII          0.011          0.011           90 2014MNRAS.445.1412Z                     2015MNRAS.451.1307Z|2014MNRAS.445.1412Z                0\n",
       "[ZBF2015] Arp244 300 12 01 54.70 -18 52 38.6       6        6           --           --             0        D ... 2014MNRAS.445.1412Z HIIReg HII|HII         0.0093         0.0093           90 2014MNRAS.445.1412Z                     2015MNRAS.451.1307Z|2014MNRAS.445.1412Z                0"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "table_simbad = Simbad.query_criteria(\"region(circle, Antennae, 14m)\", maintype=\"HII\")\n",
    "table_simbad"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "61958f83",
   "metadata": {},
   "source": [
    "Once we have identified a bibliographic reference of interest, we can search the corresponding catalogs on <ins>VizieR</ins>. Here, the Biblio column has quite some occurrences of the reference `'2015MNRAS.451.1307Z'`.\n",
    "\n",
    "Remember that by default VizieR will only return 50 entries (as in the web interface). To get all sources, set `ROW_LIMIT=-1`.\n",
    "\n",
    "A good practice is to check first what data are available by querying only a subsample, then customize your Vizier query with the useful rows and columns before downloading the entire catalog."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "id": "81ddc455",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "TableList with 2 tables:\n",
       "\t'0:J/MNRAS/451/1307/HIIreg' with 15 column(s) and 10 row(s) \n",
       "\t'1:J/MNRAS/451/1307/list' with 13 column(s) and 10 row(s) "
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "cat_viz = Vizier(row_limit=10).get_catalogs(\"2015MNRAS.451.1307Z\")\n",
    "cat_viz"
   ]
  },
  {
   "attachments": {},
   "cell_type": "markdown",
   "id": "4b881442",
   "metadata": {},
   "source": [
    "In the example above, we see that 2 tables are associated with the reference 2015MNRAS.451.1307Z: a table called 'HIIreg' accessible by the index [0] and a table called 'list' accessible by the index [1]. The number of rows has been fixed by the parameter `row_limit=10`.\n",
    "\n",
    "Let's check the 'HIIreg' table:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "id": "6a3b42d3",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'ID': 'J_MNRAS_451_1307_HIIreg',\n",
       " 'name': 'J/MNRAS/451/1307/HIIreg',\n",
       " 'description': 'Physical properties of the brightest HII regions in interacting galaxies (table A1) and isolated galaxies (table A2)'}"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# print the metadata\n",
    "cat_viz[0].meta"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "f68b359a",
   "metadata": {
    "scrolled": true,
    "tags": [
     "output_scroll"
    ]
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div><i>Table length=10</i>\n",
       "<table id=\"table139802864194688\" class=\"table-striped table-bordered table-condensed\">\n",
       "<thead><tr><th>Seq</th><th>n_Name</th><th>Name</th><th>Nf</th><th>RAJ2000</th><th>DEJ2000</th><th>logLHa</th><th>R</th><th>logMHII</th><th>rhoHII</th><th>sigma</th><th>alpVir</th><th>EWHa</th><th>logAge</th><th>Simbad</th></tr></thead>\n",
       "<thead><tr><th></th><th></th><th></th><th></th><th>&apos;h:m:s&apos;</th><th>&apos;d:m:s&apos;</th><th>log(1e-07W)</th><th>pc</th><th>log(solMass)</th><th>solMass / pc3</th><th>km / s</th><th></th><th>0.1 nm</th><th>log(yr)</th><th></th></tr></thead>\n",
       "<thead><tr><th>int16</th><th>str3</th><th>str7</th><th>int16</th><th>str10</th><th>str11</th><th>float32</th><th>int16</th><th>float32</th><th>float32</th><th>float32</th><th>float32</th><th>float32</th><th>float32</th><th>str6</th></tr></thead>\n",
       "<tr><td>1</td><td>int</td><td>NGC2146</td><td>3</td><td>06 18 39.4</td><td>+78 21 18.2</td><td>39.040</td><td>114</td><td>5.90</td><td>0.1270</td><td>15.0</td><td>40.0</td><td>159.79</td><td>6.770</td><td>Simbad</td></tr>\n",
       "<tr><td>2</td><td>int</td><td>NGC2146</td><td>3</td><td>06 18 38.1</td><td>+78 21 26.8</td><td>38.830</td><td>116</td><td>5.80</td><td>0.0970</td><td>17.0</td><td>60.0</td><td>54.70</td><td>6.810</td><td>Simbad</td></tr>\n",
       "<tr><td>3</td><td>int</td><td>NGC2146</td><td>3</td><td>06 18 44.6</td><td>+78 21 50.6</td><td>38.590</td><td>142</td><td>5.80</td><td>0.0550</td><td>11.0</td><td>30.0</td><td>125.30</td><td>6.780</td><td>Simbad</td></tr>\n",
       "<tr><td>4</td><td>int</td><td>NGC2146</td><td>3</td><td>06 18 27.7</td><td>+78 22 21.0</td><td>38.470</td><td>155</td><td>5.81</td><td>0.0410</td><td>8.6</td><td>20.0</td><td>119.64</td><td>6.780</td><td>Simbad</td></tr>\n",
       "<tr><td>5</td><td>int</td><td>NGC2146</td><td>3</td><td>06 18 35.0</td><td>+78 21 28.0</td><td>38.440</td><td>124</td><td>5.65</td><td>0.0560</td><td>15.0</td><td>80.0</td><td>103.35</td><td>6.790</td><td>Simbad</td></tr>\n",
       "<tr><td>6</td><td>int</td><td>NGC2146</td><td>3</td><td>06 18 42.8</td><td>+78 21 58.1</td><td>38.410</td><td>136</td><td>5.70</td><td>0.0470</td><td>4.0</td><td>--</td><td>155.86</td><td>6.770</td><td>Simbad</td></tr>\n",
       "<tr><td>7</td><td>int</td><td>NGC2146</td><td>3</td><td>06 18 39.8</td><td>+78 21 22.5</td><td>38.350</td><td>81</td><td>5.30</td><td>0.0960</td><td>15.0</td><td>100.0</td><td>109.47</td><td>6.790</td><td>Simbad</td></tr>\n",
       "<tr><td>8</td><td>int</td><td>NGC2146</td><td>3</td><td>06 18 48.0</td><td>+78 21 43.3</td><td>38.320</td><td>144</td><td>5.69</td><td>0.0390</td><td>4.0</td><td>--</td><td>81.89</td><td>6.800</td><td>Simbad</td></tr>\n",
       "<tr><td>9</td><td>int</td><td>NGC2146</td><td>3</td><td>06 18 42.1</td><td>+78 21 12.0</td><td>38.310</td><td>94</td><td>5.40</td><td>0.0730</td><td>4.0</td><td>--</td><td>103.95</td><td>6.790</td><td>Simbad</td></tr>\n",
       "<tr><td>10</td><td>int</td><td>NGC2146</td><td>3</td><td>06 18 44.2</td><td>+78 21 00.9</td><td>38.300</td><td>96</td><td>5.40</td><td>0.0700</td><td>4.0</td><td>--</td><td>67.87</td><td>6.800</td><td>Simbad</td></tr>\n",
       "</table></div>"
      ],
      "text/plain": [
       "<Table length=10>\n",
       " Seq  n_Name   Name    Nf   RAJ2000     DEJ2000      logLHa     R     logMHII        rhoHII     sigma   alpVir   EWHa   logAge Simbad\n",
       "                            'h:m:s'     'd:m:s'   log(1e-07W)   pc  log(solMass) solMass / pc3  km / s          0.1 nm log(yr)       \n",
       "int16  str3    str7  int16   str10       str11      float32   int16   float32       float32    float32 float32 float32 float32  str6 \n",
       "----- ------ ------- ----- ---------- ----------- ----------- ----- ------------ ------------- ------- ------- ------- ------- ------\n",
       "    1    int NGC2146     3 06 18 39.4 +78 21 18.2      39.040   114         5.90        0.1270    15.0    40.0  159.79   6.770 Simbad\n",
       "    2    int NGC2146     3 06 18 38.1 +78 21 26.8      38.830   116         5.80        0.0970    17.0    60.0   54.70   6.810 Simbad\n",
       "    3    int NGC2146     3 06 18 44.6 +78 21 50.6      38.590   142         5.80        0.0550    11.0    30.0  125.30   6.780 Simbad\n",
       "    4    int NGC2146     3 06 18 27.7 +78 22 21.0      38.470   155         5.81        0.0410     8.6    20.0  119.64   6.780 Simbad\n",
       "    5    int NGC2146     3 06 18 35.0 +78 21 28.0      38.440   124         5.65        0.0560    15.0    80.0  103.35   6.790 Simbad\n",
       "    6    int NGC2146     3 06 18 42.8 +78 21 58.1      38.410   136         5.70        0.0470     4.0      --  155.86   6.770 Simbad\n",
       "    7    int NGC2146     3 06 18 39.8 +78 21 22.5      38.350    81         5.30        0.0960    15.0   100.0  109.47   6.790 Simbad\n",
       "    8    int NGC2146     3 06 18 48.0 +78 21 43.3      38.320   144         5.69        0.0390     4.0      --   81.89   6.800 Simbad\n",
       "    9    int NGC2146     3 06 18 42.1 +78 21 12.0      38.310    94         5.40        0.0730     4.0      --  103.95   6.790 Simbad\n",
       "   10    int NGC2146     3 06 18 44.2 +78 21 00.9      38.300    96         5.40        0.0700     4.0      --   67.87   6.800 Simbad"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# print the table itself\n",
    "cat_viz[0]"
   ]
  },
  {
   "attachments": {},
   "cell_type": "markdown",
   "id": "a001606b",
   "metadata": {},
   "source": [
    "As for every function in python, we can call `help(Vizier)` in a code cell and run it to print the documentation."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "id": "9e96cf83",
   "metadata": {
    "tags": [
     "output_scroll"
    ]
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Help on VizierClass in module astroquery.vizier.core object:\n",
      "\n",
      "class VizierClass(astroquery.query.BaseQuery)\n",
      " |  VizierClass(columns=['*'], column_filters={}, catalog=None, keywords=None, ucd='', timeout=60, vizier_server='vizier.u-strasbg.fr', row_limit=50)\n",
      " |  \n",
      " |  Method resolution order:\n",
      " |      VizierClass\n",
      " |      astroquery.query.BaseQuery\n",
      " |      builtins.object\n",
      " |  \n",
      " |  Methods defined here:\n",
      " |  \n",
      " |  __init__(self, columns=['*'], column_filters={}, catalog=None, keywords=None, ucd='', timeout=60, vizier_server='vizier.u-strasbg.fr', row_limit=50)\n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      columns : list\n",
      " |          List of strings\n",
      " |      column_filters : dict\n",
      " |      catalog : str or None\n",
      " |      keywords : str or None\n",
      " |      ucd : string\n",
      " |          \"Unified Content Description\" column descriptions.  Specifying\n",
      " |          these will select only catalogs that have columns matching the\n",
      " |          column descriptions defined on the Vizier web pages.\n",
      " |          See http://vizier.u-strasbg.fr/vizier/vizHelp/1.htx#ucd and\n",
      " |          http://cds.u-strasbg.fr/w/doc/UCD/\n",
      " |      vizier_server : string\n",
      " |          Name of the VizieR mirror to use.\n",
      " |          (This parameter's default is set from a configuration object.)\n",
      " |      timeout : number\n",
      " |          timeout for connecting to server\n",
      " |          (This parameter's default is set from a configuration object.)\n",
      " |      row_limit : int\n",
      " |          Maximum number of rows that will be fetched from the result\n",
      " |          (set to -1 for unlimited).\n",
      " |          (This parameter's default is set from a configuration object.)\n",
      " |  \n",
      " |  find_catalogs(self, keywords, include_obsolete=False, verbose=False, max_catalogs=None, return_type='votable')\n",
      " |      Search Vizier for catalogs based on a set of keywords, e.g. author name\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      keywords : list or string\n",
      " |          List of keywords, or space-separated set of keywords.\n",
      " |          From `Vizier <http://vizier.u-strasbg.fr/doc/asu-summary.htx>`_:\n",
      " |          \"names or words of title of catalog. The words are and'ed, i.e.\n",
      " |          only the catalogues characterized by all the words are selected.\"\n",
      " |      include_obsolete : bool, optional\n",
      " |          If set to True, catalogs marked obsolete will also be returned.\n",
      " |      max_catalogs : int or None\n",
      " |          The maximum number of catalogs to return.  If ``None``, all\n",
      " |          catalogs will be returned.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      resource_dict : dict\n",
      " |          Dictionary of the \"Resource\" name and the VOTable resource object.\n",
      " |          \"Resources\" are generally publications; one publication may contain\n",
      " |          many tables.\n",
      " |      \n",
      " |      Examples\n",
      " |      --------\n",
      " |      >>> from astroquery.vizier import Vizier\n",
      " |      >>> catalog_list = Vizier.find_catalogs('Kang W51')\n",
      " |      >>> print(catalog_list)\n",
      " |      {u'J/ApJ/706/83': <astropy.io.votable.tree.Resource at 0x108d4d490>,\n",
      " |       u'J/ApJS/191/232': <astropy.io.votable.tree.Resource at 0x108d50490>}\n",
      " |      >>> print({k:v.description for k,v in catalog_list.items()})\n",
      " |      {u'J/ApJ/706/83': u'Embedded YSO candidates in W51 (Kang+, 2009)',\n",
      " |       u'J/ApJS/191/232': u'CO survey of W51 molecular cloud (Bieging+, 2010)'}\n",
      " |  \n",
      " |  get_catalogs(self, *args, **kwargs)\n",
      " |      Queries the service and returns a table object.\n",
      " |      \n",
      " |      Query the Vizier service for a specific catalog\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      catalog : str, Resource, or list, optional\n",
      " |          The catalog(s) that will be retrieved\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      table : A `~astropy.table.Table` object.\n",
      " |  \n",
      " |  get_catalogs_async(self, catalog, verbose=False, return_type='votable', get_query_payload=False)\n",
      " |      Query the Vizier service for a specific catalog\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      catalog : str, Resource, or list, optional\n",
      " |          The catalog(s) that will be retrieved\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      response : `~requests.Response`\n",
      " |          Returned if asynchronous method used\n",
      " |  \n",
      " |  query_constraints(self, *args, **kwargs)\n",
      " |      Queries the service and returns a table object.\n",
      " |      \n",
      " |      Send a query to Vizier in which you specify constraints with\n",
      " |      keyword/value pairs.\n",
      " |      \n",
      " |      See `the vizier constraints page\n",
      " |      <http://vizier.cfa.harvard.edu/vizier/vizHelp/cst.htx>`_ for details.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      catalog : str or list, optional\n",
      " |          The catalog(s) which must be searched for this identifier.\n",
      " |          If not specified, all matching catalogs will be searched.\n",
      " |      kwargs : dict\n",
      " |          Any key/value pairs besides \"catalog\" will be parsed\n",
      " |          as additional column filters.\n",
      " |      \n",
      " |      Examples\n",
      " |      --------\n",
      " |      >>> from astroquery.vizier import Vizier\n",
      " |      >>> # note that glon/glat constraints here *must* be floats\n",
      " |      >>> result = Vizier.query_constraints(catalog='J/ApJ/723/492/table1',\n",
      " |      ...                                   GLON='>49.0 & <51.0', GLAT='<0')\n",
      " |      >>> result[result.keys()[0]].pprint()\n",
      " |          GRSMC      GLON   GLAT   VLSR  ... RD09 _RA.icrs _DE.icrs\n",
      " |      ------------- ------ ------ ------ ... ---- -------- --------\n",
      " |      G049.49-00.41  49.49  -0.41  56.90 ... RD09   290.95    14.50\n",
      " |      G049.39-00.26  49.39  -0.26  50.94 ... RD09   290.77    14.48\n",
      " |      G049.44-00.06  49.44  -0.06  62.00 ... RD09   290.61    14.62\n",
      " |      G049.04-00.31  49.04  -0.31  66.25 ... RD09   290.64    14.15\n",
      " |      G049.74-00.56  49.74  -0.56  67.95 ... RD09   291.21    14.65\n",
      " |      G050.39-00.41  50.39  -0.41  41.17 ... RD09   291.39    15.29\n",
      " |      G050.24-00.61  50.24  -0.61  41.17 ... RD09   291.50    15.06\n",
      " |      G050.94-00.61  50.94  -0.61  40.32 ... RD09   291.85    15.68\n",
      " |      G049.99-00.16  49.99  -0.16  46.27 ... RD09   290.97    15.06\n",
      " |      G049.44-00.06  49.44  -0.06  46.27 ... RD09   290.61    14.62\n",
      " |      G049.54-00.01  49.54  -0.01  56.05 ... RD09   290.61    14.73\n",
      " |      G049.74-00.01  49.74  -0.01  48.39 ... RD09   290.71    14.91\n",
      " |      G049.54-00.91  49.54  -0.91  43.29 ... RD09   291.43    14.31\n",
      " |      G049.04-00.46  49.04  -0.46  58.60 ... RD09   290.78    14.08\n",
      " |      G049.09-00.06  49.09  -0.06  46.69 ... RD09   290.44    14.31\n",
      " |      G050.84-00.11  50.84  -0.11  50.52 ... RD09   291.34    15.83\n",
      " |      G050.89-00.11  50.89  -0.11  59.45 ... RD09   291.37    15.87\n",
      " |      G050.44-00.41  50.44  -0.41  64.12 ... RD09   291.42    15.34\n",
      " |      G050.84-00.76  50.84  -0.76  61.15 ... RD09   291.94    15.52\n",
      " |      G050.29-00.46  50.29  -0.46  14.81 ... RD09   291.39    15.18\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      table : A `~astropy.table.Table` object.\n",
      " |  \n",
      " |  query_constraints_async(self, catalog=None, return_type='votable', cache=True, get_query_payload=False, **kwargs)\n",
      " |      Send a query to Vizier in which you specify constraints with\n",
      " |      keyword/value pairs.\n",
      " |      \n",
      " |      See `the vizier constraints page\n",
      " |      <http://vizier.cfa.harvard.edu/vizier/vizHelp/cst.htx>`_ for details.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      catalog : str or list, optional\n",
      " |          The catalog(s) which must be searched for this identifier.\n",
      " |          If not specified, all matching catalogs will be searched.\n",
      " |      kwargs : dict\n",
      " |          Any key/value pairs besides \"catalog\" will be parsed\n",
      " |          as additional column filters.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      response : `requests.Response`\n",
      " |          The response of the HTTP request.\n",
      " |      \n",
      " |      Examples\n",
      " |      --------\n",
      " |      >>> from astroquery.vizier import Vizier\n",
      " |      >>> # note that glon/glat constraints here *must* be floats\n",
      " |      >>> result = Vizier.query_constraints(catalog='J/ApJ/723/492/table1',\n",
      " |      ...                                   GLON='>49.0 & <51.0', GLAT='<0')\n",
      " |      >>> result[result.keys()[0]].pprint()\n",
      " |          GRSMC      GLON   GLAT   VLSR  ... RD09 _RA.icrs _DE.icrs\n",
      " |      ------------- ------ ------ ------ ... ---- -------- --------\n",
      " |      G049.49-00.41  49.49  -0.41  56.90 ... RD09   290.95    14.50\n",
      " |      G049.39-00.26  49.39  -0.26  50.94 ... RD09   290.77    14.48\n",
      " |      G049.44-00.06  49.44  -0.06  62.00 ... RD09   290.61    14.62\n",
      " |      G049.04-00.31  49.04  -0.31  66.25 ... RD09   290.64    14.15\n",
      " |      G049.74-00.56  49.74  -0.56  67.95 ... RD09   291.21    14.65\n",
      " |      G050.39-00.41  50.39  -0.41  41.17 ... RD09   291.39    15.29\n",
      " |      G050.24-00.61  50.24  -0.61  41.17 ... RD09   291.50    15.06\n",
      " |      G050.94-00.61  50.94  -0.61  40.32 ... RD09   291.85    15.68\n",
      " |      G049.99-00.16  49.99  -0.16  46.27 ... RD09   290.97    15.06\n",
      " |      G049.44-00.06  49.44  -0.06  46.27 ... RD09   290.61    14.62\n",
      " |      G049.54-00.01  49.54  -0.01  56.05 ... RD09   290.61    14.73\n",
      " |      G049.74-00.01  49.74  -0.01  48.39 ... RD09   290.71    14.91\n",
      " |      G049.54-00.91  49.54  -0.91  43.29 ... RD09   291.43    14.31\n",
      " |      G049.04-00.46  49.04  -0.46  58.60 ... RD09   290.78    14.08\n",
      " |      G049.09-00.06  49.09  -0.06  46.69 ... RD09   290.44    14.31\n",
      " |      G050.84-00.11  50.84  -0.11  50.52 ... RD09   291.34    15.83\n",
      " |      G050.89-00.11  50.89  -0.11  59.45 ... RD09   291.37    15.87\n",
      " |      G050.44-00.41  50.44  -0.41  64.12 ... RD09   291.42    15.34\n",
      " |      G050.84-00.76  50.84  -0.76  61.15 ... RD09   291.94    15.52\n",
      " |      G050.29-00.46  50.29  -0.46  14.81 ... RD09   291.39    15.18\n",
      " |  \n",
      " |  query_object(self, *args, **kwargs)\n",
      " |      Queries the service and returns a table object.\n",
      " |      \n",
      " |      Serves the same purpose as `query_object` but only\n",
      " |      returns the HTTP response rather than the parsed result.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      object_name : str\n",
      " |          The name of the identifier.\n",
      " |      catalog : str or list, optional\n",
      " |          The catalog(s) which must be searched for this identifier.\n",
      " |          If not specified, all matching catalogs will be searched.\n",
      " |      radius : `~astropy.units.Quantity` or None\n",
      " |          A degree-equivalent radius (optional).\n",
      " |      coordinate_system : str or None\n",
      " |          If the object name is given as a coordinate, you *should* use\n",
      " |          `~astroquery.vizier.VizierClass.query_region`, but you can\n",
      " |          specify a coordinate frame here instead (today, J2000, B1975,\n",
      " |          B1950, B1900, B1875, B1855, Galactic, Supergal., Ecl.J2000, )\n",
      " |      \n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      table : A `~astropy.table.Table` object.\n",
      " |  \n",
      " |  query_object_async(self, object_name, catalog=None, radius=None, coordinate_frame=None, get_query_payload=False, return_type='votable', cache=True)\n",
      " |      Serves the same purpose as `query_object` but only\n",
      " |      returns the HTTP response rather than the parsed result.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      object_name : str\n",
      " |          The name of the identifier.\n",
      " |      catalog : str or list, optional\n",
      " |          The catalog(s) which must be searched for this identifier.\n",
      " |          If not specified, all matching catalogs will be searched.\n",
      " |      radius : `~astropy.units.Quantity` or None\n",
      " |          A degree-equivalent radius (optional).\n",
      " |      coordinate_system : str or None\n",
      " |          If the object name is given as a coordinate, you *should* use\n",
      " |          `~astroquery.vizier.VizierClass.query_region`, but you can\n",
      " |          specify a coordinate frame here instead (today, J2000, B1975,\n",
      " |          B1950, B1900, B1875, B1855, Galactic, Supergal., Ecl.J2000, )\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      response : `~requests.Response`\n",
      " |          The response of the HTTP request.\n",
      " |  \n",
      " |  query_region(self, *args, **kwargs)\n",
      " |      Queries the service and returns a table object.\n",
      " |      \n",
      " |      Serves the same purpose as `query_region` but only\n",
      " |      returns the HTTP response rather than the parsed result.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      coordinates : str, `astropy.coordinates` object, or `~astropy.table.Table`\n",
      " |          The target around which to search. It may be specified as a\n",
      " |          string in which case it is resolved using online services or as\n",
      " |          the appropriate `astropy.coordinates` object. ICRS coordinates\n",
      " |          may also be entered as a string.  If a table is used, each of\n",
      " |          its rows will be queried, as long as it contains two columns\n",
      " |          named ``_RAJ2000`` and ``_DEJ2000`` with proper angular units.\n",
      " |      radius : convertible to `~astropy.coordinates.Angle`\n",
      " |          The radius of the circular region to query.\n",
      " |      inner_radius : convertible to `~astropy.coordinates.Angle`\n",
      " |          When set in addition to ``radius``, the queried region becomes\n",
      " |          annular, with outer radius ``radius`` and inner radius\n",
      " |          ``inner_radius``.\n",
      " |      width : convertible to `~astropy.coordinates.Angle`\n",
      " |          The width of the square region to query.\n",
      " |      height : convertible to `~astropy.coordinates.Angle`\n",
      " |          When set in addition to ``width``, the queried region becomes\n",
      " |          rectangular, with the specified ``width`` and ``height``.\n",
      " |      catalog : str or list, optional\n",
      " |          The catalog(s) which must be searched for this identifier.\n",
      " |          If not specified, all matching catalogs will be searched.\n",
      " |      column_filters: dict, optional\n",
      " |          Constraints on columns of the result. The dictionary contains\n",
      " |          the column name as keys, and the constraints as values.\n",
      " |      frame : str, optional\n",
      " |          The frame to use for the request. It should be 'fk5', 'icrs',\n",
      " |          or 'galactic'. This choice influences the the orientation of\n",
      " |          box requests.\n",
      " |      \n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      table : A `~astropy.table.Table` object.\n",
      " |  \n",
      " |  query_region_async(self, coordinates, radius=None, inner_radius=None, width=None, height=None, catalog=None, get_query_payload=False, cache=True, return_type='votable', column_filters={}, frame='fk5')\n",
      " |      Serves the same purpose as `query_region` but only\n",
      " |      returns the HTTP response rather than the parsed result.\n",
      " |      \n",
      " |      Parameters\n",
      " |      ----------\n",
      " |      coordinates : str, `astropy.coordinates` object, or `~astropy.table.Table`\n",
      " |          The target around which to search. It may be specified as a\n",
      " |          string in which case it is resolved using online services or as\n",
      " |          the appropriate `astropy.coordinates` object. ICRS coordinates\n",
      " |          may also be entered as a string.  If a table is used, each of\n",
      " |          its rows will be queried, as long as it contains two columns\n",
      " |          named ``_RAJ2000`` and ``_DEJ2000`` with proper angular units.\n",
      " |      radius : convertible to `~astropy.coordinates.Angle`\n",
      " |          The radius of the circular region to query.\n",
      " |      inner_radius : convertible to `~astropy.coordinates.Angle`\n",
      " |          When set in addition to ``radius``, the queried region becomes\n",
      " |          annular, with outer radius ``radius`` and inner radius\n",
      " |          ``inner_radius``.\n",
      " |      width : convertible to `~astropy.coordinates.Angle`\n",
      " |          The width of the square region to query.\n",
      " |      height : convertible to `~astropy.coordinates.Angle`\n",
      " |          When set in addition to ``width``, the queried region becomes\n",
      " |          rectangular, with the specified ``width`` and ``height``.\n",
      " |      catalog : str or list, optional\n",
      " |          The catalog(s) which must be searched for this identifier.\n",
      " |          If not specified, all matching catalogs will be searched.\n",
      " |      column_filters: dict, optional\n",
      " |          Constraints on columns of the result. The dictionary contains\n",
      " |          the column name as keys, and the constraints as values.\n",
      " |      frame : str, optional\n",
      " |          The frame to use for the request. It should be 'fk5', 'icrs',\n",
      " |          or 'galactic'. This choice influences the the orientation of\n",
      " |          box requests.\n",
      " |      \n",
      " |      Returns\n",
      " |      -------\n",
      " |      response : `requests.Response`\n",
      " |          The response of the HTTP request.\n",
      " |  \n",
      " |  ----------------------------------------------------------------------\n",
      " |  Readonly properties defined here:\n",
      " |  \n",
      " |  valid_keywords\n",
      " |  \n",
      " |  ----------------------------------------------------------------------\n",
      " |  Data descriptors defined here:\n",
      " |  \n",
      " |  catalog\n",
      " |      The default catalog to search.  If left empty, will search all\n",
      " |      catalogs.\n",
      " |  \n",
      " |  column_filters\n",
      " |      Filters to run on the individual columns. See the Vizier website\n",
      " |      for details.\n",
      " |  \n",
      " |  columns\n",
      " |      Columns to include.  The special keyword 'all' will return ALL\n",
      " |      columns from ALL retrieved tables.\n",
      " |  \n",
      " |  keywords\n",
      " |      The set of keywords to filter the Vizier search\n",
      " |  \n",
      " |  ucd\n",
      " |      UCD criteria: see http://vizier.u-strasbg.fr/vizier/vizHelp/1.htx#ucd\n",
      " |      \n",
      " |      Examples\n",
      " |      --------\n",
      " |      >>> Vizier.ucd = '(spect.dopplerVeloc*|phys.veloc*)'\n",
      " |  \n",
      " |  ----------------------------------------------------------------------\n",
      " |  Data and other attributes defined here:\n",
      " |  \n",
      " |  __abstractmethods__ = frozenset()\n",
      " |  \n",
      " |  ----------------------------------------------------------------------\n",
      " |  Methods inherited from astroquery.query.BaseQuery:\n",
      " |  \n",
      " |  __call__(self, *args, **kwargs)\n",
      " |      init a fresh copy of self\n",
      " |  \n",
      " |  ----------------------------------------------------------------------\n",
      " |  Data descriptors inherited from astroquery.query.BaseQuery:\n",
      " |  \n",
      " |  __dict__\n",
      " |      dictionary for instance variables (if defined)\n",
      " |  \n",
      " |  __weakref__\n",
      " |      list of weak references to the object (if defined)\n",
      "\n"
     ]
    }
   ],
   "source": [
    "help(Vizier)"
   ]
  },
  {
   "attachments": {},
   "cell_type": "markdown",
   "id": "e4b26551",
   "metadata": {},
   "source": [
    "Here we learn that `columns` should be a list, `column_filters` a dictionary, and `row_limits` is an int for which -1 means infinity. Now we can customize our VizieR query by selecting columns, filtering over the interacting galaxies (`n_Name='int'`), and keeping only the first region for each galaxy (`Seq=1`, for visualization purposes)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "id": "8d3308b8",
   "metadata": {
    "tags": [
     "output_scroll"
    ]
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div><i>Table length=12</i>\n",
       "<table id=\"table139801773618800\" class=\"table-striped table-bordered table-condensed\">\n",
       "<thead><tr><th>Name</th><th>RAJ2000</th><th>DEJ2000</th><th>logLHa</th><th>R</th><th>sigma</th></tr></thead>\n",
       "<thead><tr><th></th><th>&apos;h:m:s&apos;</th><th>&apos;d:m:s&apos;</th><th>log(1e-07W)</th><th>pc</th><th>km / s</th></tr></thead>\n",
       "<thead><tr><th>str7</th><th>str10</th><th>str11</th><th>float32</th><th>int16</th><th>float32</th></tr></thead>\n",
       "<tr><td>NGC2146</td><td>06 18 39.4</td><td>+78 21 18.2</td><td>39.040</td><td>114</td><td>15.0</td></tr>\n",
       "<tr><td>Arp244</td><td>12 01 54.6</td><td>-18 53 03.1</td><td>40.200</td><td>280</td><td>32.8</td></tr>\n",
       "<tr><td>NGC520</td><td>01 24 33.3</td><td>+03 48 04.6</td><td>39.120</td><td>255</td><td>14.1</td></tr>\n",
       "<tr><td>UGC3995</td><td>07 44 09.2</td><td>+29 14 51.3</td><td>40.290</td><td>270</td><td>43.0</td></tr>\n",
       "<tr><td>NGC3788</td><td>11 39 41.4</td><td>+31 54 23.3</td><td>39.700</td><td>280</td><td>11.9</td></tr>\n",
       "<tr><td>NGC3786</td><td>11 39 45.1</td><td>+31 55 46.3</td><td>39.860</td><td>300</td><td>16.5</td></tr>\n",
       "<tr><td>NGC2782</td><td>09 14 05.3</td><td>+40 06 50.4</td><td>39.800</td><td>166</td><td>28.0</td></tr>\n",
       "<tr><td>NGC2993</td><td>09 45 48.3</td><td>-14 22 05.9</td><td>40.070</td><td>258</td><td>12.0</td></tr>\n",
       "<tr><td>NGC2992</td><td>09 45 41.9</td><td>-14 19 33.4</td><td>39.180</td><td>100</td><td>16.0</td></tr>\n",
       "<tr><td>NGC3991</td><td>11 57 31.7</td><td>+32 20 29.6</td><td>40.440</td><td>470</td><td>20.9</td></tr>\n",
       "<tr><td>Arp270</td><td>10 49 55.8</td><td>+32 59 28.0</td><td>40.220</td><td>229</td><td>20.4</td></tr>\n",
       "<tr><td>NGC3769</td><td>11 37 43.7</td><td>+47 53 24.4</td><td>38.310</td><td>66</td><td>4.0</td></tr>\n",
       "</table></div>"
      ],
      "text/plain": [
       "<Table length=12>\n",
       "  Name   RAJ2000     DEJ2000      logLHa     R    sigma \n",
       "         'h:m:s'     'd:m:s'   log(1e-07W)   pc   km / s\n",
       "  str7    str10       str11      float32   int16 float32\n",
       "------- ---------- ----------- ----------- ----- -------\n",
       "NGC2146 06 18 39.4 +78 21 18.2      39.040   114    15.0\n",
       " Arp244 12 01 54.6 -18 53 03.1      40.200   280    32.8\n",
       " NGC520 01 24 33.3 +03 48 04.6      39.120   255    14.1\n",
       "UGC3995 07 44 09.2 +29 14 51.3      40.290   270    43.0\n",
       "NGC3788 11 39 41.4 +31 54 23.3      39.700   280    11.9\n",
       "NGC3786 11 39 45.1 +31 55 46.3      39.860   300    16.5\n",
       "NGC2782 09 14 05.3 +40 06 50.4      39.800   166    28.0\n",
       "NGC2993 09 45 48.3 -14 22 05.9      40.070   258    12.0\n",
       "NGC2992 09 45 41.9 -14 19 33.4      39.180   100    16.0\n",
       "NGC3991 11 57 31.7 +32 20 29.6      40.440   470    20.9\n",
       " Arp270 10 49 55.8 +32 59 28.0      40.220   229    20.4\n",
       "NGC3769 11 37 43.7 +47 53 24.4      38.310    66     4.0"
      ]
     },
     "execution_count": 15,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "cat_hii = Vizier(\n",
    "    columns=[\"Name\", \"RAJ2000\", \"DEJ2000\", \"logLHa\", \"R\", \"sigma\"],\n",
    "    column_filters={\"Seq\": \"==1\", \"n_Name\": \"int\"},\n",
    "    row_limit=-1,\n",
    ").get_catalogs(\"2015MNRAS.451.1307Z\")[0]\n",
    "cat_hii"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "91e09bd7",
   "metadata": {},
   "source": [
    "We can also display the table on <ins>Aladin</ins>. \n",
    "This should work by simply typing `aladin.add_table(cat_hii)`\n",
    "but if you get errors in the format of some columns, \n",
    "you can just send the name and coordinates to Aladin:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "id": "b1649a7a",
   "metadata": {},
   "outputs": [],
   "source": [
    "aladin.add_table(cat_hii[\"Name\", \"RAJ2000\", \"DEJ2000\"])"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "cd7b2fb8",
   "metadata": {},
   "source": [
    "Go up to the <ins>Aladin Lite</ins> widget, zoom out to see all the sources, then rotate and zoom in to see the interacting galaxies. You can click on one source to display the information in the table. \n",
    "\n",
    "Change the view to the AllWISE Infrared survey, either in the widget:\n",
    "\n",
    "`Base image layer -> The Wide-field Infrared Survey Explorer` \n",
    "\n",
    "or in the command line below.\n",
    "\n",
    "You can find the list of available sky maps at https://aladin.u-strasbg.fr/hips/list"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "id": "bef37a4f",
   "metadata": {},
   "outputs": [],
   "source": [
    "aladin.survey = \"P/allWISE/color\""
   ]
  },
  {
   "cell_type": "markdown",
   "id": "2f035030",
   "metadata": {},
   "source": [
    "If you want to overlay the survey instead of replacing it:\n",
    "\n",
    "`aladin.overlay_survey= 'P/allWISE/color'`\n",
    "\n",
    "`aladin.overlay_survey_opacity = 0.5`"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "dc6c20f2",
   "metadata": {},
   "source": [
    "**Exercise:**\n",
    "\n",
    "Retrieve the second table from Zaragoza-Cardiel+, 2015 (2015MNRAS.451.1307Z) containing data related to the image fits files and try to answer the questions:\n",
    "- What are the typical sizes of the fits images?\n",
    "- What is the approximate resolution of the images? [arcsec/pix]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "id": "9c82126a",
   "metadata": {},
   "outputs": [],
   "source": [
    "# write your code here"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "2395d384",
   "metadata": {},
   "source": [
    "## Step #5: Cross-match tables\n",
    "\n",
    "[![Vizier](https://custom-icon-badges.demolab.com/badge/Vizier-gray.svg?logo=vizier&logoColor=orange&logoWidth=20)](https://vizier.cds.unistra.fr/viz-bin/VizieR \"https://vizier.cds.unistra.fr/viz-bin/VizieR\")\n",
    "[![Xmatch](https://custom-icon-badges.demolab.com/badge/Xmatch-gray.svg?logo=xmatch&logoColor=blue&logoWidth=20)](http://cdsxmatch.u-strasbg.fr/ \"http://cdsxmatch.u-strasbg.fr/\")\n",
    "\n",
    "We have HII data for a sample of interacting galaxies. Since we are also interested in the infrared fluxes we search for the Wide-field Infrared Survey Explorer ([AllWISE](https://wise2.ipac.caltech.edu/docs/release/allwise/)) data release. \n",
    "\n",
    "We want to match the sources in J/MNRAS/451/1307/HIIreg with the AllWISE source catalog that contains 747 million objects!\n",
    "\n",
    "We use the <ins>X-Match</ins> python module for cross-identification of objects. It is particularly efficient and fast with very large catalogs, like AllWISE. All we need are the names of the catalogs, the names of the columns containing the coordinates of the sources, and the desired maximum distance for the match (optionally the area as well, otherwise all-sky is the default)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "0c628188",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "TableList with 1 tables:\n",
       "\t'0:II/328/allwise' with 28 column(s) and 50 row(s) "
      ]
     },
     "execution_count": 19,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# What is the AllWISE catalogue reference in VizieR?\n",
    "cat_allwise = Vizier.get_catalogs(\"AllWISE\")\n",
    "cat_allwise"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "id": "01e608f6",
   "metadata": {
    "tags": [
     "output_scroll"
    ]
   },
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div><i>Table length=1314</i>\n",
       "<table id=\"table139801745895488\" class=\"table-striped table-bordered table-condensed\">\n",
       "<thead><tr><th>angDist</th><th>_RAJ2000</th><th>_DEJ2000</th><th>recno</th><th>Seq</th><th>n_Name</th><th>Name</th><th>Nf</th><th>RAJ2000_1</th><th>DEJ2000_1</th><th>logLHa</th><th>R</th><th>logMHII</th><th>rhoHII</th><th>sigma</th><th>alpVir</th><th>EWHa</th><th>logAge</th><th>Simbad</th><th>AllWISE</th><th>RAJ2000_2</th><th>DEJ2000_2</th><th>eeMaj</th><th>eeMin</th><th>eePA</th><th>W1mag</th><th>W2mag</th><th>W3mag</th><th>W4mag</th><th>Jmag</th><th>Hmag</th><th>Kmag</th><th>e_W1mag</th><th>e_W2mag</th><th>e_W3mag</th><th>e_W4mag</th><th>e_Jmag</th><th>e_Hmag</th><th>e_Kmag</th><th>ID</th><th>ccf</th><th>ex</th><th>var</th><th>qph</th><th>pmRA</th><th>e_pmRA</th><th>pmDE</th><th>e_pmDE</th><th>d2M</th></tr></thead>\n",
       "<thead><tr><th>float64</th><th>float64</th><th>float64</th><th>int64</th><th>int64</th><th>str3</th><th>str7</th><th>int64</th><th>str10</th><th>str11</th><th>float64</th><th>int64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>str6</th><th>str19</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>int64</th><th>str4</th><th>int64</th><th>str4</th><th>str4</th><th>int64</th><th>int64</th><th>int64</th><th>int64</th><th>float64</th></tr></thead>\n",
       "<tr><td>9.439952</td><td>250.775</td><td>36.839056</td><td>1820</td><td>27</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 06.0</td><td>+36 50 20.6</td><td>37.69</td><td>66</td><td>4.9</td><td>0.06</td><td>4.0</td><td>--</td><td>134.26</td><td>6.78</td><td>Simbad</td><td>J164305.83+365029.8</td><td>250.7743217</td><td>36.8416214</td><td>0.0374</td><td>0.0369</td><td>67.0</td><td>12.87</td><td>12.918</td><td>8.29</td><td>5.588</td><td>--</td><td>--</td><td>--</td><td>0.073</td><td>0.025</td><td>0.022</td><td>0.037</td><td>--</td><td>--</td><td>--</td><td>2499136301351044678</td><td>0000</td><td>3</td><td>3000</td><td>AAAA</td><td>10</td><td>40</td><td>359</td><td>42</td><td>--</td></tr>\n",
       "<tr><td>6.754932</td><td>250.767917</td><td>36.834944</td><td>1821</td><td>28</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 04.3</td><td>+36 50 05.8</td><td>37.66</td><td>101</td><td>5.1</td><td>0.031</td><td>4.0</td><td>--</td><td>22.27</td><td>6.91</td><td>Simbad</td><td>J164303.76+365003.8</td><td>250.7656686</td><td>36.8344125</td><td>0.0212</td><td>0.0201</td><td>135.0</td><td>10.792</td><td>11.24</td><td>7.028</td><td>4.232</td><td>12.866</td><td>12.603</td><td>12.523</td><td>0.03</td><td>0.019</td><td>0.013</td><td>0.021</td><td>0.043</td><td>0.056</td><td>0.058</td><td>2499136301351044679</td><td>hd00</td><td>3</td><td>n9n3</td><td>AAAA</td><td>-929</td><td>25</td><td>-1205</td><td>26</td><td>0.458</td></tr>\n",
       "<tr><td>8.575258</td><td>250.767917</td><td>36.834944</td><td>1821</td><td>28</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 04.3</td><td>+36 50 05.8</td><td>37.66</td><td>101</td><td>5.1</td><td>0.031</td><td>4.0</td><td>--</td><td>22.27</td><td>6.91</td><td>Simbad</td><td>J164303.79+364959.7</td><td>250.7658199</td><td>36.8332538</td><td>0.0379</td><td>0.0338</td><td>158.6</td><td>10.953</td><td>10.936</td><td>7.758</td><td>5.483</td><td>--</td><td>--</td><td>--</td><td>0.023</td><td>0.022</td><td>0.024</td><td>0.066</td><td>--</td><td>--</td><td>--</td><td>2499136301351044647</td><td>d0d0</td><td>5</td><td>3200</td><td>AAAA</td><td>113</td><td>31</td><td>484</td><td>32</td><td>--</td></tr>\n",
       "<tr><td>5.99581</td><td>250.76375</td><td>36.833083</td><td>1822</td><td>29</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 03.3</td><td>+36 49 59.1</td><td>37.66</td><td>87</td><td>5.0</td><td>0.039</td><td>4.0</td><td>--</td><td>20.6</td><td>6.93</td><td>Simbad</td><td>J164303.79+364959.7</td><td>250.7658199</td><td>36.8332538</td><td>0.0379</td><td>0.0338</td><td>158.6</td><td>10.953</td><td>10.936</td><td>7.758</td><td>5.483</td><td>--</td><td>--</td><td>--</td><td>0.023</td><td>0.022</td><td>0.024</td><td>0.066</td><td>--</td><td>--</td><td>--</td><td>2499136301351044647</td><td>d0d0</td><td>5</td><td>3200</td><td>AAAA</td><td>113</td><td>31</td><td>484</td><td>32</td><td>--</td></tr>\n",
       "<tr><td>7.312318</td><td>250.76375</td><td>36.833083</td><td>1822</td><td>29</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 03.3</td><td>+36 49 59.1</td><td>37.66</td><td>87</td><td>5.0</td><td>0.039</td><td>4.0</td><td>--</td><td>20.6</td><td>6.93</td><td>Simbad</td><td>J164303.76+365003.8</td><td>250.7656686</td><td>36.8344125</td><td>0.0212</td><td>0.0201</td><td>135.0</td><td>10.792</td><td>11.24</td><td>7.028</td><td>4.232</td><td>12.866</td><td>12.603</td><td>12.523</td><td>0.03</td><td>0.019</td><td>0.013</td><td>0.021</td><td>0.043</td><td>0.056</td><td>0.058</td><td>2499136301351044679</td><td>hd00</td><td>3</td><td>n9n3</td><td>AAAA</td><td>-929</td><td>25</td><td>-1205</td><td>26</td><td>0.458</td></tr>\n",
       "<tr><td>3.802161</td><td>250.766667</td><td>36.832444</td><td>1823</td><td>30</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 04.0</td><td>+36 49 56.8</td><td>37.66</td><td>91</td><td>5.1</td><td>0.036</td><td>4.0</td><td>--</td><td>8.9</td><td>7.09</td><td>Simbad</td><td>J164303.79+364959.7</td><td>250.7658199</td><td>36.8332538</td><td>0.0379</td><td>0.0338</td><td>158.6</td><td>10.953</td><td>10.936</td><td>7.758</td><td>5.483</td><td>--</td><td>--</td><td>--</td><td>0.023</td><td>0.022</td><td>0.024</td><td>0.066</td><td>--</td><td>--</td><td>--</td><td>2499136301351044647</td><td>d0d0</td><td>5</td><td>3200</td><td>AAAA</td><td>113</td><td>31</td><td>484</td><td>32</td><td>--</td></tr>\n",
       "<tr><td>7.648264</td><td>250.766667</td><td>36.832444</td><td>1823</td><td>30</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 04.0</td><td>+36 49 56.8</td><td>37.66</td><td>91</td><td>5.1</td><td>0.036</td><td>4.0</td><td>--</td><td>8.9</td><td>7.09</td><td>Simbad</td><td>J164303.76+365003.8</td><td>250.7656686</td><td>36.8344125</td><td>0.0212</td><td>0.0201</td><td>135.0</td><td>10.792</td><td>11.24</td><td>7.028</td><td>4.232</td><td>12.866</td><td>12.603</td><td>12.523</td><td>0.03</td><td>0.019</td><td>0.013</td><td>0.021</td><td>0.043</td><td>0.056</td><td>0.058</td><td>2499136301351044679</td><td>hd00</td><td>3</td><td>n9n3</td><td>AAAA</td><td>-929</td><td>25</td><td>-1205</td><td>26</td><td>0.458</td></tr>\n",
       "<tr><td>9.762527</td><td>250.769167</td><td>36.832833</td><td>1825</td><td>34</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 04.6</td><td>+36 49 58.2</td><td>37.49</td><td>57</td><td>4.7</td><td>0.06</td><td>4.0</td><td>--</td><td>18.26</td><td>6.98</td><td>Simbad</td><td>J164303.79+364959.7</td><td>250.7658199</td><td>36.8332538</td><td>0.0379</td><td>0.0338</td><td>158.6</td><td>10.953</td><td>10.936</td><td>7.758</td><td>5.483</td><td>--</td><td>--</td><td>--</td><td>0.023</td><td>0.022</td><td>0.024</td><td>0.066</td><td>--</td><td>--</td><td>--</td><td>2499136301351044647</td><td>d0d0</td><td>5</td><td>3200</td><td>AAAA</td><td>113</td><td>31</td><td>484</td><td>32</td><td>--</td></tr>\n",
       "<tr><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td></tr>\n",
       "<tr><td>2.619531</td><td>262.364167</td><td>75.690389</td><td>1794</td><td>80</td><td>iso</td><td>NGC6412</td><td>0</td><td>17 29 27.4</td><td>+75 41 25.4</td><td>36.9</td><td>60</td><td>4.4</td><td>0.03</td><td>4.0</td><td>--</td><td>3.33</td><td>7.12</td><td>Simbad</td><td>J172927.37+754122.7</td><td>262.3640507</td><td>75.6896619</td><td>0.0403</td><td>0.0374</td><td>77.5</td><td>12.05</td><td>12.097</td><td>12.917</td><td>9.369</td><td>12.52</td><td>12.177</td><td>12.107</td><td>0.023</td><td>0.021</td><td>--</td><td>--</td><td>0.022</td><td>0.019</td><td>0.025</td><td>2613175701351028212</td><td>0000</td><td>2</td><td>11nn</td><td>AAUU</td><td>-48</td><td>34</td><td>26</td><td>34</td><td>0.157</td></tr>\n",
       "<tr><td>6.607669</td><td>262.364167</td><td>75.690389</td><td>1794</td><td>80</td><td>iso</td><td>NGC6412</td><td>0</td><td>17 29 27.4</td><td>+75 41 25.4</td><td>36.9</td><td>60</td><td>4.4</td><td>0.03</td><td>4.0</td><td>--</td><td>3.33</td><td>7.12</td><td>Simbad</td><td>J172925.67+754123.7</td><td>262.3569903</td><td>75.6899173</td><td>0.3268</td><td>0.1897</td><td>101.4</td><td>16.104</td><td>16.518</td><td>12.619</td><td>9.184</td><td>--</td><td>--</td><td>--</td><td>0.126</td><td>0.248</td><td>--</td><td>--</td><td>--</td><td>--</td><td>--</td><td>2613175701351029820</td><td>0000</td><td>2</td><td>3nnn</td><td>BBUU</td><td>-253</td><td>460</td><td>362</td><td>559</td><td>--</td></tr>\n",
       "<tr><td>5.639364</td><td>250.76375</td><td>36.834722</td><td>1795</td><td>1</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 03.3</td><td>+36 50 05.0</td><td>39.51</td><td>154</td><td>6.33</td><td>0.14</td><td>18.0</td><td>27.0</td><td>68.4</td><td>6.8</td><td>Simbad</td><td>J164303.76+365003.8</td><td>250.7656686</td><td>36.8344125</td><td>0.0212</td><td>0.0201</td><td>135.0</td><td>10.792</td><td>11.24</td><td>7.028</td><td>4.232</td><td>12.866</td><td>12.603</td><td>12.523</td><td>0.03</td><td>0.019</td><td>0.013</td><td>0.021</td><td>0.043</td><td>0.056</td><td>0.058</td><td>2499136301351044679</td><td>hd00</td><td>3</td><td>n9n3</td><td>AAAA</td><td>-929</td><td>25</td><td>-1205</td><td>26</td><td>0.458</td></tr>\n",
       "<tr><td>7.969164</td><td>250.76375</td><td>36.834722</td><td>1795</td><td>1</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 03.3</td><td>+36 50 05.0</td><td>39.51</td><td>154</td><td>6.33</td><td>0.14</td><td>18.0</td><td>27.0</td><td>68.4</td><td>6.8</td><td>Simbad</td><td>J164303.79+364959.7</td><td>250.7658199</td><td>36.8332538</td><td>0.0379</td><td>0.0338</td><td>158.6</td><td>10.953</td><td>10.936</td><td>7.758</td><td>5.483</td><td>--</td><td>--</td><td>--</td><td>0.023</td><td>0.022</td><td>0.024</td><td>0.066</td><td>--</td><td>--</td><td>--</td><td>2499136301351044647</td><td>d0d0</td><td>5</td><td>3200</td><td>AAAA</td><td>113</td><td>31</td><td>484</td><td>32</td><td>--</td></tr>\n",
       "<tr><td>7.499991</td><td>250.764583</td><td>36.836306</td><td>1796</td><td>2</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 03.5</td><td>+36 50 10.7</td><td>39.36</td><td>131</td><td>6.15</td><td>0.148</td><td>13.9</td><td>21.0</td><td>138.94</td><td>6.78</td><td>Simbad</td><td>J164303.76+365003.8</td><td>250.7656686</td><td>36.8344125</td><td>0.0212</td><td>0.0201</td><td>135.0</td><td>10.792</td><td>11.24</td><td>7.028</td><td>4.232</td><td>12.866</td><td>12.603</td><td>12.523</td><td>0.03</td><td>0.019</td><td>0.013</td><td>0.021</td><td>0.043</td><td>0.056</td><td>0.058</td><td>2499136301351044679</td><td>hd00</td><td>3</td><td>n9n3</td><td>AAAA</td><td>-929</td><td>25</td><td>-1205</td><td>26</td><td>0.458</td></tr>\n",
       "<tr><td>3.3028</td><td>250.775</td><td>36.842361</td><td>1797</td><td>3</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 06.0</td><td>+36 50 32.5</td><td>38.88</td><td>138</td><td>5.94</td><td>0.079</td><td>6.0</td><td>7.0</td><td>264.23</td><td>6.75</td><td>Simbad</td><td>J164305.83+365029.8</td><td>250.7743217</td><td>36.8416214</td><td>0.0374</td><td>0.0369</td><td>67.0</td><td>12.87</td><td>12.918</td><td>8.29</td><td>5.588</td><td>--</td><td>--</td><td>--</td><td>0.073</td><td>0.025</td><td>0.022</td><td>0.037</td><td>--</td><td>--</td><td>--</td><td>2499136301351044678</td><td>0000</td><td>3</td><td>3000</td><td>AAAA</td><td>10</td><td>40</td><td>359</td><td>42</td><td>--</td></tr>\n",
       "<tr><td>2.552215</td><td>250.774583</td><td>36.840944</td><td>1806</td><td>12</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 05.9</td><td>+36 50 27.4</td><td>38.26</td><td>72</td><td>5.2</td><td>0.1</td><td>4.0</td><td>--</td><td>264.14</td><td>6.75</td><td>Simbad</td><td>J164305.83+365029.8</td><td>250.7743217</td><td>36.8416214</td><td>0.0374</td><td>0.0369</td><td>67.0</td><td>12.87</td><td>12.918</td><td>8.29</td><td>5.588</td><td>--</td><td>--</td><td>--</td><td>0.073</td><td>0.025</td><td>0.022</td><td>0.037</td><td>--</td><td>--</td><td>--</td><td>2499136301351044678</td><td>0000</td><td>3</td><td>3000</td><td>AAAA</td><td>10</td><td>40</td><td>359</td><td>42</td><td>--</td></tr>\n",
       "<tr><td>7.317245</td><td>250.764583</td><td>36.83625</td><td>1817</td><td>24</td><td>iso</td><td>NGC6207</td><td>0</td><td>16 43 03.5</td><td>+36 50 10.5</td><td>37.73</td><td>72</td><td>4.9</td><td>0.056</td><td>4.0</td><td>--</td><td>200.19</td><td>6.76</td><td>Simbad</td><td>J164303.76+365003.8</td><td>250.7656686</td><td>36.8344125</td><td>0.0212</td><td>0.0201</td><td>135.0</td><td>10.792</td><td>11.24</td><td>7.028</td><td>4.232</td><td>12.866</td><td>12.603</td><td>12.523</td><td>0.03</td><td>0.019</td><td>0.013</td><td>0.021</td><td>0.043</td><td>0.056</td><td>0.058</td><td>2499136301351044679</td><td>hd00</td><td>3</td><td>n9n3</td><td>AAAA</td><td>-929</td><td>25</td><td>-1205</td><td>26</td><td>0.458</td></tr>\n",
       "</table></div>"
      ],
      "text/plain": [
       "<Table length=1314>\n",
       "angDist   _RAJ2000   _DEJ2000 recno  Seq  n_Name   Name    Nf  RAJ2000_1   DEJ2000_1   logLHa   R   logMHII  rhoHII  sigma   alpVir   EWHa   logAge ...   Kmag  e_W1mag e_W2mag e_W3mag e_W4mag  e_Jmag  e_Hmag  e_Kmag          ID         ccf    ex  var  qph   pmRA e_pmRA  pmDE e_pmDE   d2M  \n",
       "float64   float64    float64  int64 int64  str3    str7  int64   str10       str11    float64 int64 float64 float64 float64 float64 float64 float64 ... float64 float64 float64 float64 float64 float64 float64 float64        int64        str4 int64 str4 str4 int64 int64  int64 int64  float64\n",
       "-------- ---------- --------- ----- ----- ------ ------- ----- ---------- ----------- ------- ----- ------- ------- ------- ------- ------- ------- ... ------- ------- ------- ------- ------- ------- ------- ------- ------------------- ---- ----- ---- ---- ----- ------ ----- ------ -------\n",
       "9.439952    250.775 36.839056  1820    27    iso NGC6207     0 16 43 06.0 +36 50 20.6   37.69    66     4.9    0.06     4.0      --  134.26    6.78 ...      --   0.073   0.025   0.022   0.037      --      --      -- 2499136301351044678 0000     3 3000 AAAA    10     40   359     42      --\n",
       "6.754932 250.767917 36.834944  1821    28    iso NGC6207     0 16 43 04.3 +36 50 05.8   37.66   101     5.1   0.031     4.0      --   22.27    6.91 ...  12.523    0.03   0.019   0.013   0.021   0.043   0.056   0.058 2499136301351044679 hd00     3 n9n3 AAAA  -929     25 -1205     26   0.458\n",
       "8.575258 250.767917 36.834944  1821    28    iso NGC6207     0 16 43 04.3 +36 50 05.8   37.66   101     5.1   0.031     4.0      --   22.27    6.91 ...      --   0.023   0.022   0.024   0.066      --      --      -- 2499136301351044647 d0d0     5 3200 AAAA   113     31   484     32      --\n",
       " 5.99581  250.76375 36.833083  1822    29    iso NGC6207     0 16 43 03.3 +36 49 59.1   37.66    87     5.0   0.039     4.0      --    20.6    6.93 ...      --   0.023   0.022   0.024   0.066      --      --      -- 2499136301351044647 d0d0     5 3200 AAAA   113     31   484     32      --\n",
       "7.312318  250.76375 36.833083  1822    29    iso NGC6207     0 16 43 03.3 +36 49 59.1   37.66    87     5.0   0.039     4.0      --    20.6    6.93 ...  12.523    0.03   0.019   0.013   0.021   0.043   0.056   0.058 2499136301351044679 hd00     3 n9n3 AAAA  -929     25 -1205     26   0.458\n",
       "3.802161 250.766667 36.832444  1823    30    iso NGC6207     0 16 43 04.0 +36 49 56.8   37.66    91     5.1   0.036     4.0      --     8.9    7.09 ...      --   0.023   0.022   0.024   0.066      --      --      -- 2499136301351044647 d0d0     5 3200 AAAA   113     31   484     32      --\n",
       "7.648264 250.766667 36.832444  1823    30    iso NGC6207     0 16 43 04.0 +36 49 56.8   37.66    91     5.1   0.036     4.0      --     8.9    7.09 ...  12.523    0.03   0.019   0.013   0.021   0.043   0.056   0.058 2499136301351044679 hd00     3 n9n3 AAAA  -929     25 -1205     26   0.458\n",
       "9.762527 250.769167 36.832833  1825    34    iso NGC6207     0 16 43 04.6 +36 49 58.2   37.49    57     4.7    0.06     4.0      --   18.26    6.98 ...      --   0.023   0.022   0.024   0.066      --      --      -- 2499136301351044647 d0d0     5 3200 AAAA   113     31   484     32      --\n",
       "     ...        ...       ...   ...   ...    ...     ...   ...        ...         ...     ...   ...     ...     ...     ...     ...     ...     ... ...     ...     ...     ...     ...     ...     ...     ...     ...                 ...  ...   ...  ...  ...   ...    ...   ...    ...     ...\n",
       "2.619531 262.364167 75.690389  1794    80    iso NGC6412     0 17 29 27.4 +75 41 25.4    36.9    60     4.4    0.03     4.0      --    3.33    7.12 ...  12.107   0.023   0.021      --      --   0.022   0.019   0.025 2613175701351028212 0000     2 11nn AAUU   -48     34    26     34   0.157\n",
       "6.607669 262.364167 75.690389  1794    80    iso NGC6412     0 17 29 27.4 +75 41 25.4    36.9    60     4.4    0.03     4.0      --    3.33    7.12 ...      --   0.126   0.248      --      --      --      --      -- 2613175701351029820 0000     2 3nnn BBUU  -253    460   362    559      --\n",
       "5.639364  250.76375 36.834722  1795     1    iso NGC6207     0 16 43 03.3 +36 50 05.0   39.51   154    6.33    0.14    18.0    27.0    68.4     6.8 ...  12.523    0.03   0.019   0.013   0.021   0.043   0.056   0.058 2499136301351044679 hd00     3 n9n3 AAAA  -929     25 -1205     26   0.458\n",
       "7.969164  250.76375 36.834722  1795     1    iso NGC6207     0 16 43 03.3 +36 50 05.0   39.51   154    6.33    0.14    18.0    27.0    68.4     6.8 ...      --   0.023   0.022   0.024   0.066      --      --      -- 2499136301351044647 d0d0     5 3200 AAAA   113     31   484     32      --\n",
       "7.499991 250.764583 36.836306  1796     2    iso NGC6207     0 16 43 03.5 +36 50 10.7   39.36   131    6.15   0.148    13.9    21.0  138.94    6.78 ...  12.523    0.03   0.019   0.013   0.021   0.043   0.056   0.058 2499136301351044679 hd00     3 n9n3 AAAA  -929     25 -1205     26   0.458\n",
       "  3.3028    250.775 36.842361  1797     3    iso NGC6207     0 16 43 06.0 +36 50 32.5   38.88   138    5.94   0.079     6.0     7.0  264.23    6.75 ...      --   0.073   0.025   0.022   0.037      --      --      -- 2499136301351044678 0000     3 3000 AAAA    10     40   359     42      --\n",
       "2.552215 250.774583 36.840944  1806    12    iso NGC6207     0 16 43 05.9 +36 50 27.4   38.26    72     5.2     0.1     4.0      --  264.14    6.75 ...      --   0.073   0.025   0.022   0.037      --      --      -- 2499136301351044678 0000     3 3000 AAAA    10     40   359     42      --\n",
       "7.317245 250.764583  36.83625  1817    24    iso NGC6207     0 16 43 03.5 +36 50 10.5   37.73    72     4.9   0.056     4.0      --  200.19    6.76 ...  12.523    0.03   0.019   0.013   0.021   0.043   0.056   0.058 2499136301351044679 hd00     3 n9n3 AAAA  -929     25 -1205     26   0.458"
      ]
     },
     "execution_count": 20,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "xmatch_zbf_wise = XMatch.query(\n",
    "    cat1=\"vizier:J/MNRAS/451/1307/HIIreg\",\n",
    "    cat2=\"vizier:II/328/allwise\",\n",
    "    max_distance=10 * u.arcsec,\n",
    "    colRA1=\"RAJ2000\",\n",
    "    colDec1=\"DEJ2000\",\n",
    "    colRA2=\"RAJ2000\",\n",
    "    colDec2=\"DEJ2000\",\n",
    ")\n",
    "xmatch_zbf_wise"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "f8ce7eeb",
   "metadata": {},
   "source": [
    "<h4 align=\"center\">This is the end of the tutorial.</h4> \n",
    "\n",
    "<h4 align=\"center\">Try to apply what you have learned here to your data sets and science cases! </h4>"
   ]
  }
 ],
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