GCN Circular 29198
Subject
GRB 201104B: Maidanak and CrAO optical observations
Event
Date
2020-12-29T22:49:38Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), V. Rumyantsev (CrAO), O. Burhonov
(UBAI), Sh. Ehgamberdiev (UBAI) report on behalf of IKI GRB FuN:
We observed GRB 201104B (Sbarufatti et al., GCN 28825) with AZT-22
telescope of Maidanak Observatory and ZTSh telescope of CrAO.
The optical afterglow (Marshall et al., GCN 28827; Vielfaure et al.,
GCN 28840; Oates et al., GCN 28851; Belkin et al., GCNs 28852, 28856,
28871; Gupta et al., GCN 28860; Hosokawa et al., GCN 28870) at redshift
z = 1.954 (Vielfaure et al., GCN 28840) is detected in stacked images.
Preliminary photometry of the afterglow is following.
Date UT start t-T0 Filter Exp. OT Err. UL(3 sigma)
(mid, days) (s)
2020-11-09 15:57:43 4.95413 R 12*300 22.89 0.09 24.3 AZT-22
2020-11-13 19:50:05 9.12784 R 45*120 23.20 0.12 24.0 ZTSh
The photometry is based on nearby USNO-B1.0 stars.
A light curve base on our observations including reported earlier
(Belkin et al., GCNs 28852, 28856, 28871) can be found in
http://grb.rssi.ru/GRB201104B/GRB201104B_LC_R.png