GCN Circular 27583
Subject
GRB 200412B: Mondy optical observations
Event
Date
2020-04-15T10:11:58Z (6 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), M. Eselevich
(ISTP), E. Mazaeva (IKI), A. Volnova (IKI) report on behalf of IKI-GRB FuN:
We observed the field of GRB 200412B (Fermi GBM team, GCN 27547; Mailyan
et al., GCN 27558; see also Burgess et al., GCN 27548; Longo et al., GCN
27557; Page et al., GCN 27561; Gupta et al., GCN 27563; Zheng et al.,
GCN 27565) with AZT-33IK 1.5-m telescope of Sayan observatory (Mondy)
starting on 2020-04-14 (UT) 14:24:54.
We clearly detected the afterglow of GRB 200412B (Lipunov et al.,
GCNs 27555, 27556; see also Kumar et al., GCN 27564; Belkin et al., GCN
27566, Stecklum et al., GCN 27567, Moskvitin GCN 27570; Xin et al., GCN
27571). Preliminary photometry of the afterglow is following.
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2020-04-14 14:24:54 2.23002 R 15*120 21.22 0.08 22.8
The photometry is based on nearby USNO-B1.0 stars
UUSNO-B1.0_id R2
1525-0302108 17.21
1524-0300914 17.20
1525-0301929 17.85