GCN Circular 33073
Subject
GRB 221216A: AKO Upper Limit
Date
2022-12-16T16:32:07Z (a year 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 field of GRB 221216A detected by FERMI (GCN 33066) and Swift
(Dichiara et al., GCN 33067) with our 0.35m f/7.7 robotic telescope. The
observation was done on 16 December 2022 from 15:17:47 to 15:32:55 (UT), 4.1
hours after the GRB trigger. We obtained multiple 180-sec exposures in Ic
filter. We did not detect any afterglow within XRT localization (Evans et
al., GCN 33071). This is consistent with the reported non-detections of (Lu
et al., GCN 33068) and (Gendre et al., GCN 33069).
The following upper limit was calculated using Atlas catalogue as a
reference:
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JD (mid), T_mid-T0(hrs), Exposure (sec), Filter, Lim_mag
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2459930.142604, 4.1, 5 x 180 (stacked), Ic, > 17.3
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These magnitudes are not corrected for galactic extinction.