GCN Circular 32968
Subject
GRB 221120A: AKO Telescope Upper Limits
Date
2022-11-22T04:39:10Z (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 short GRB 221120A detected by Swift (R. Eyles-Ferris et al.,
GCN 32955), with our 0.35m telescope. The observation was done on 21
November 2022 from 15:36:06 to 15:48:28 (UT), 18.2 hours after the Swift
trigger. We obtained multiple 180-sec exposures in Ic filter. We did not
detect any afterglow within XRT localization (M.R. Goad et al., GCN 32962).
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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2459905.155422, 18.2, 5 x 180 (stacked), Ic, > 19.5
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These magnitudes are not corrected for galactic extinction.