GCN Circular 29620
Subject
GRB 210306A: continued Mondy optical observations
Event
Date
2021-03-08T11:16:12Z (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 continue observations (Belkin et al., GCN 29616) the field of GRB
210306A (D'Elia et al., GCN 29597; Ohno et al., GCN 29602) with AZT-33IK
telescope of Sayan observatory (Mondy). 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; Dimple et al., GCN 29618) is still detected in a
combined image. Preliminary photometry of the afterglow in the combined
image is following
Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2021-03-07 13:43:24 1.41281 R 5*120 22.09 0.25 22.1
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