GCN Circular 30178
Subject
GRB 210610B: CrAO/ZTSh optical afterglow photometry
Event
Date
2021-06-10T22:44:37Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
V. Rumyantsev (CrAO), A. Pozanenko (IKI), S. Belkin (IKI), N. Pankov
(HSE) report on behalf of GRB IKI FuN:
We report photometry of GRB 210610B afterglow (Page et al., GCN
30170; Lipunov et al. GCNs 30173, 30176; Kumar et al. GCN 30174;
Rumyantsev et al., GCN 30175; Hu et al., GCN 30177) obtained with ZTSh
2.6m telescope of CrAO observatory.
Preliminary photometry of the optical afterglow in R- filter is following
Date UT start Filter Exp. OT Err. UL(3sigma)
(s)
2021-06-10 20:19:24 R 1*10 16.11 0.02 21.5
2021-06-10 20:59:50 R 1*10 16.99 0.02 21.2
The photometry is based on the nearby USNO-A2.0 star
USNO-A2.0_id
1043-0282589 16:15:36.30 +14:23:18.2 R=16.88
We continue observations in BVRI filters and will report photometry
after data receiving.