GCN Circular 13760
Subject
GRB 120911A: optical upper limit CrAO
Date
2012-09-13T07:18:31Z (12 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
V. Rumyantsev, N.Pit' (CrAO), A. Pozanenko (IKI) report on behalf of larger
GRB follow-up collaboration:
We observed the field of the Swift GRB 120911A (Cannizzo et al., GCN
13744) with AZT-11 telescope of CrAO observatory starting on Sep. 11 (UT)
21:10:38. We took several images in R-filter of 180 s exposure. Within
enhanced XRT afterglow position (Beardmore et al., GCN 13748) we do not
detect any new object. A preliminary 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)
0.6130 R 20x180 n/d 20.9