GCN Circular 12900
Subject
GRB 120118B: optical upper limit
Date
2012-01-27T09:43:39Z (13 years ago)
From
Alina Volnova at SAI MSU <alinusss@gmail.com>
A. Volnova (SAI MSU), E. Litvinenko (UBAI), I. Molotov (KIAM), A.
Pozanenko (IKI) on behalf of larger GRB follow up collaboration
report:
We observed the field of the Swift GRB 120118B (Littlejohns et al.,
GCNs 12852, 12854) with ORI-40 telescope of Kitab ISON observatory on
Jan. 18 between (UT) 17:39:55 and 18:10:51. We obtained several
unfiltered images with exposure of 60 seconds. On the stacked image we
do not detect a source reported by D'Avanzo et al. (GCN 12870). The
photometry is based on nearby reference stars of USNO-B1.0 (R2
magnitudes):
Tstart UT, T0+, Filter, Exposure, OT, UL (3 sigma)
(mid, d) (s)
17:39:55 0.03127 none 26x60 n/d 19.5