GCN Circular 11078
Subject
GRB100807A: optical observation in CrAO
Date
2010-08-09T15:05:23Z (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 100807A (Grupe et al., GCN 11067)
with Shajn telescope of CrAO in filter R between (UT) Aug. 07 22:58:14 --
Aug. 08 01:17:44 under descending seeing with mean value of ~ 2.1". We do
not detect the afterglow (Cenko, GCN 11073). The extended object ~ 8" was
detected in coordinates (J2000) center RA: 03 41 12.92 Dec: +67 40 19.4.
The position of optical afterglow (Cenko, GCN 11073) is in the edge of the
extended object.
The photometry is based on USNO-B1.0 star 1576-0084708 (J2000) RA= 03 41
11.50 Dec= +67 39 58.1 (assuming R=16.37):
T0+ Filter, Exposure, Ext. Object mag. Upper Limit
(mid, d) (s)
0.6214 R 97x60 23.0 +/- 0.2 23.8
With upper limit of R=23.8 we confirm the fading nature of afterglow of GRB
100807A (Grupe et al., GCN 11067). The extended object might be a host
galaxy of GRB 100807A.
The combined images can be found
http://grb.rssi.ru/GRB100807A/GRB100807a_100807_R_ZTSh.gif
