GCN Circular 10521
Subject
GRB 100316A: optical observations in CrAO
Date
2010-03-18T01:23:18Z (14 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 100316A (Baumgartner et al. GCN
10484) with Shajn telescope of CrAO starting (UT) March 16 19:15 under
descending weather conditions and mean seeing of 2 arcsec. No object is
detected in enhanced XRT error circle (Evans, GCN 10490).
The upper limit of point like object in a stacked image based on USNO-B1.0
star 1618-0120609 (J2000) RA= 16:48:06.44 Dec= +71:50:15.2 (assuming
R2=15.25) is following:
T0+ Filter, Exposure, mag.
(mid, d) (s)
0.7061 R 8x60 > 21.6
The non-detection is strongly support the object of R~20.5 reported in GCN
10487 (Gorosabel et al) is the optical afterglow of GRB100316A.