GCN Circular 29302
Subject
GRB 210112A: Mondy optical observations
Event
Date
2021-01-13T20:28:18Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
N. Pankov (HSE), A. Pozanenko (IKI), E. Klunko (ISTP), S. Belkin (IKI)
report on behalf of GRB IKI FuN:
We observed the field of GRB 210112A (Ambrosi et al., GCN 29289; Ursi
et al., GCN #9293) with AZT-33IK telescope of Sayan observatory (Mondy)
starting on 2021-01-12 (UT) 20:41:40. The optical afterglow (Ambrosi et
al., GCN 29289; Kann et al., GCNs 29296, 29300) is not detected in
stacked image in R-filter. The non detection of the afterlow is
consistent with other non-detections in R-filter (Novichonok et al.,
GCN 29292; Gupta et al., GCN 29301).
Preliminary photometry of the optical transient in a combined image is
following
Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2021-01-12 20:41:40 0.80738 R 18*120 n/d n/d 22.4
The photometry is based on the nearby USNO-B1.0 stars.