GCN Circular 33020
Subject
Swift GRB221204.45 AKO Upper Limit
Date
2022-12-04T15:53:52Z (2 years ago)
From
Mohammad Odeh at Al Khatim Observatory M44 <mshodeh@gmail.com>
Mohammad Odeh of Al-Khatim Observatory (AKO) operated by the International
Astronomical Center, in Abu Dhabi, UAE.
We observed the Swift GRB221204.45 detected by Swift (Trigger No 1143281)
with our 0.35m robotic telescope. The observation was done on 04 December
2022 from 15:05:55 to 15:18:02 (UT), 4.47 hours after the Swift trigger. We
obtained multiple 180-sec exposures in Ic filter. We did not detect any
afterglow within XRT localization. This is consistent with the reported
non-detections of (Lipunov et al., GCN 33018).
The following upper limit was calculated using Atlas catalogue as a
reference:
----------------------------------------------------------------------------
-
JD (mid), T_mid-T0(hrs), Exposure (sec), Filter, Lim_mag
----------------------------------------------------------------------------
-
2459918.134358, 4.47, 5 x 180 (stacked), Ic, > 17.7
----------------------------------------------------------------------------
-
These magnitudes are not corrected for galactic extinction.