GCN Circular 28708
Subject
GRB 201020A: CrAO/ZTSH optical observations
Event
Date
2020-10-21T00:03:22Z (6 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
N. Pankov (HSE), A. Pozanenko (IKI), V. Rumyantsev (CrAO), S. Belkin
(IKI), A. Volnova (IKI) report on behalf of IKI GRB FuN:
We observed the GRB 201020A (Ambrosi et al., GCN 28696) with ZTSH 2.6m
telescope of CrAO observatory starting on Oct. 20 (UT) 16:06:30. The
optical afterglow (Ambrosi et al., GCN 28696; Adachi et al., GCN
28697; Fu et al., GCN 28701; Belkin et al., GCN 28703) is clearly
detected in R filter.
Preliminary photometry of the afterglow in a combined image is following
Date UT start t-T0 Filter Exp. OT err UL(3sigma)
(mid, days) (s)
2018-10-20 16:06:30 0.42991 R 30*120 20.00 0.10 21.5
The photometry is based on several nearby USNO-B1.0 (R2) stars.