GCN Circular 14581
Subject
GRB 130502A: optical upper limit
Date
2013-05-05T22:25:32Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
V. Rumyantsev (CrAO), K.Antoniuk (CrAO), A. Pozanenko (IKI) report on
behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 130502A (Troja et al., GCN 14527)
with AZT-11 telescope of CrAO observatory on May 02 starting on (UT)
18:20:46, i.e. ~30 min after burst trigger. We took several images in
R-filter of 180 s exposure. Within enchanced XRT position (Beardmore et
al., GCN 14536) we do not detect any source. Preliminary photometry of
a combined image is following
T_start (UT) T0+ Filter Exp. OT UpperLimit (3 sigma)
mid,days s
2013-05-02T18:20:46.18 0.0419 R 3600 n/d 20.8
The photometry is based on USNO-B1.0 star 0898-0181247
09 14 15.80 -00 08 13.7 assuming R=18.02.