GCN Circular 13981
Subject
GRB 121108A: optical upper limit
Event
Date
2012-11-21T17:12:37Z (13 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
V. Rumyantsev, N.Pit' (CrAO), ��. Volnova (SAI MSU, IKI), A. Pozanenko
(IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 121108A (Ukwatta et al., GCN
13952) with AZT-11 telescope of CrAO observatory starting on Nov. 08
(UT) 18:07:04. We took several images in R-filter of 180 s exposure.
Within enhanced XRT afterglow position (Beardmore et al., GCN 13959) we
do not detect any new object. A photometry of co-added frame is based
on the USNO-B1.0 (R2) nearby stars is following:
T0+, Filter Exposure, OT, UL (3 sigma)
mid, d (s)
0.02395 R 10x180 n/d 18.9