GCN Circular 16747
Subject
GRB 140824A: optical upper limit in CrAO
Date
2014-08-26T18:11:29Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
V. Rumyantsev (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB
follow-up collaboration:
We observed the field of the Swift GRB 140824A (Beardmore et al., GCN
16732) with ZTSh telescope of CrAO observatory starting on Aug. 24 (UT)
17:48:55 (9.1 hours after burst trigger). We took several images in
R-filter of 120 s exposure. Within enhanced XRT position (Evans et al.,
GCN 16735) we do not detect any source. Photometry of a combined image
is following
Date UT start, t-t0 Filter Exp. OT UL (3 sigma)
(mid, days) (s)
2014-08-24 17:48:55 0.4105 R 39x120 n/d 23.5
The photometry is based on USNO-B1.0 star
1233-0239576 (13:46:31.55 +33:18:14.7) assuming R=19.66