GCN Circular 29616
Subject
GRB 210306A: Mondy optical observations
Event
Date
2021-03-07T20:21:30Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), N. Pankov (HSE)
report on behalf of GRB IKI FuN:
We observed the field of GRB 210306A (D'Elia et al., GCN 29597; Ohno et
al., GCN 29602) with AZT-33IK telescope of Sayan observatory (Mondy)
starting on 2021-03-06 (UT) 14:50:30. The optical afterglow (D'Elia et
al., GCN 29597; Watson et al., GCN 29598; Romanov, GCN 29599;
Strausbaugh et al., GCN 29600; Hentunen et al., GCN 29603; Stecklum et
al., GCN 29604; Lipunov et al. GCN 29606, Zhu et al. GCN 29607; Hosokawa
et al., GCN 29608) is clearly detected in a combined image. Preliminary
photometry of the object in a combined image is following
Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2021-03-06 14:50:30 0.47677 R 30*120 20.48 0.05 22.0
The photometry is based on the nearby USNO-B1.0 stars
USNO-B1.0_id R2
1501-0181731 15.23
1502-0183049 17.69
1501-0181697 17.1