diff --git a/agasc/supplement/magnitudes/mag_estimate.py b/agasc/supplement/magnitudes/mag_estimate.py
index b7426e90..fca3a1c9 100644
--- a/agasc/supplement/magnitudes/mag_estimate.py
+++ b/agasc/supplement/magnitudes/mag_estimate.py
@@ -574,14 +574,12 @@ def get_mag_from_img(slot_data, t_start, ok=True):
 
 OBS_STATS_INFO = {
     'agasc_id': 'AGASC ID of the star',
-    'obsid': 'OBSID corresponding to the dwell when the observation is made',
+    'obsid': 'OBSID at the time the star catalog is commanded (from kadi.commands)',
     'slot': 'Slot number',
     'type': 'GUI/ACQ/BOT',
-    'mp_starcat_time':
-        'Timestamp (from kadi.commands) for starcat command '
-        'preceding the dwell of an observation.',
-    'tstart': 'Dwell start time from kadi.events.manvrs',
-    'tstop': 'Dwell end time from kadi.events.manvrs',
+    'mp_starcat_time': 'The time at which the star catalog is commanded (from kadi.commands)',
+    'tstart': 'Start time of the observation according to kadi.commands (in cxc seconds)',
+    'tstop': 'Start time of the observation according to kadi.commands (in cxc seconds)',
     'mag_correction': 'Overall correction applied to the magnitude estimate',
     'responsivity': 'Responsivity correction applied to the magnitude estimate',
     'droop_shift': 'Droop shift correction applied to the magnitude estimate',
diff --git a/agasc/supplement/utils.py b/agasc/supplement/utils.py
index 3fc8a974..e67bd667 100644
--- a/agasc/supplement/utils.py
+++ b/agasc/supplement/utils.py
@@ -50,9 +50,9 @@
     'mag_aca_err': 'Star magnitude uncertainty determined with ACA.',
     'last_obs_time': 'mp_starcat_time of the last observation of a star',
     'mp_starcat_time':
-        'timestamp from kadi.commands for starcat command preceding the dwell of an observation',
+        'The time at which the star catalog is commanded (from kadi.commands)',
     'obsid':
-        'The OBSID corresponding to the dwell when an observation is made. Might not be unique.',
+        'The OBSID at the time the star catalog is commanded (from kadi.commands).',
     'status':
         'Flag to tell include/excude the observation when estimating magnitude (0 means "include")',
     'comments': '',