GCN Circular 29167
Subject
GRB 201223A: Mondy and Kitab optical observations
Date
2020-12-24T13:09:08Z (3 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), N. Pankov (HSE), E. Klunko
(ISTP), A. Novichonok (Petrozavodsk State University, KIAM), Sh.
Ehgamberdiev (UBAI) report on behalf of IKI-GRB-FuN:
We observed the field of GRB 201223A (Gropp et al., GCN 29158) with
AZT-33IK telescope of Sayan observatory (Mondy) starting on Dec. 23 (UT)
18:29:01 and Kitab-ISON RC-36 telescope starting (UT) 19:25:57. The
optical transient (Lipunov et al. GCN 29157; Gropp et al., GCN 29158;
Zhu et al. GCN 29159; Hu et al. GCN 29160; Hosokawa et al. GCN 29164;
Romanov et al. GCN 29165; Xin et al. GCN 29166) is detected in our
stacked images in R-filter.
Preliminary photometry of the optical transient in a combined images is
following
Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2020-12-23 18:29:01 0.05943 R 10*120 18.95 0.23 19.5 AZT-33IK
2020-12-23 18:29:01 0.05943 R 55*120 19.38 0.09 22.1 AZT-33IK
2020-12-23 19:25:57 0.08161 R 60*60 19.40 0.20 19.6 RC-36
The photometry is based on the nearby USNO-B1.0 stars
USNO-B1.0_id R2
1611-0080890 18.64
1612-0081305 18.44