[vsnet-grb-info 27532] GRB 210306A: continued Mondy optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Tue Mar 9 15:32:43 JST 2021
TITLE: GCN CIRCULAR
NUMBER: 29635
SUBJECT: GRB 210306A: continued Mondy optical observations
DATE: 21/03/09 06:31:50 GMT
FROM: Alexei Pozanenko at IKI, Moscow <apozanen at 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., GCNs 29616,29620) 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 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)
2021-03-08 13:47:43 2.43317 R 30*120 22.68 0.18 22.9
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 17.11
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