GCN Circular 12793
Subject
GRB 111225A: optical observations in CrAO
Date
2011-12-31T15:26:40Z (12 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
V. Rumyantsev (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB
follow-up collaboration:
We observed the field of GRB 111125A (Siegel et al. GCN 12720) with Shajn
telescope of CrAO observatory on Dec. 28 between (UT) 21:28: and 22:38 under
a mean seeing of 1.7 arsces. We took several frames with exposure of 60 s in
R-band. We clearly detect afterglow of GRB 111225A (Klotz et al. GCN 12722)
on a stacked image. A photometry is based on the USNO B1.0 star 1415-0025726
(00 52 35.11 +51 33 58.9, J2000) assuming R=16.50.
T_start UT T0+ Filter, Exposure, OT, uplim (3 sigma)
(mid, d) (s)
21:28:14 3.7590 R 62x60 22.51 +/- 0.10 24.0