GCN Circular 12500
Subject
GRB 111029A: optical upper limit
Date
2011-10-29T12:04:50Z (13 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
L. Elenin (ISON), A. Pozanenko (IKI), I. Molotov (KIAM) report on behalf of
larger GRB follow-up collaboration:
We observed the field of GRB 111029A (Swift trigger 506519; Troja et al.,
GCN 12498) with 0.45-m telescope �f ISON-NM observatory starting in
automatic response mode on Oct. 29 (UT) 09:47:47, i.e. 187 s after burst
trigger. We took 31 unfiltered images. We do not detect any source within
XRT error circle. The photometry of a single and co-added frames is based
on the USNO-B1.0 nearby stars (R magnitudes):
T_start, T0+, Exposure, OT, Upper Limit (3sigma)
(UT) (mid, s) (s)
09:47:47 216.5 60 n/d 18.3
09:47:47 1101.5 15x60 n/d 19.5
09:47:47 1385.0 31x60 n/d 20.3