GCN Circular 30299
Subject
GRB 210619B: AbAO optical observations
Event
Date
2021-06-22T12:13:52Z (4 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), R. Ya. Inasaridze (AbAO), V. R.
Ayvazian (AbAO), G. V. Kapanadze (AbAO), N. Pankov (HSE, IKI) report on
behalf of IKI GRB FuN:
We observed the field of GRB 210619B (D'Avanzo et al., GCN 30261; Zhao
et al., GCN 30264; Axelsson et al., GCN 30270; Svinkin et al., GCN
30276; Levin et al., GCN 30283; Kawakubo et al., GCN 30284) with AS-32
telescope of Abastumani observatory (AbAO) in R-filter on June, 21. The
optical afterglow (Lipunov et al., GCN 30259; D'Avanzo et al., GCNs
30261, 30288; Lipunov et al., GCN 30262; Jelinek et al., GCNs 30263,
30281; Kong, GCN 30265; Pellegrin et al., GCN 30268, Perley et al., GCN
30271; Zheng and Filippenko, GCN 30273; Blazek et al., GCN 30274; Kann
et al., GCN 30275; Xin et al., GCN 30277; Shrestha et al., GCN 30280;
Kumar et al., GCN 30286; Moskvitin et al., GCN 30291; Romanov, GCN
30292; Hu et al., GCN 30293; Zhu et al., GCN 30294) is detected in the
stacked image. Preliminary photometry of the afterglow is following
Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2021-06-21 23:16:31 1.98931 R 55*60 20.6 0.3 20.6
The photometry is based on the nearby stars:
USNO-B1.0 R2
1238-0493928 15.08
1238-0494511 15.67