GCN Circular 11077
Subject
GRB 100805A: optical observation in CrAO
Date
2010-08-09T11:35:24Z (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 100805A (Hoversten et al., GCN
11047) with Shajn telescope of CrAO in filter R between (UT) July, 07
18:57:40 - 20:10:19 under good weather conditions and mean seeing of about
1.7". Within enhanced Swift-XRT position (Goad et al., GCN 11053) we do not
detect the afterglow (Cenko, GCN 11050). However we detect the object in
coordinates (J2000) RA: 19 59 30.11 Dec: +52 37 37.79. The object is 5.6"
away from the center of enhanced XRT position (Goad et al., GCN 11053) and
about 4.5" from afterglow position (Cenko, GCN 11050; Holland et al, GCN
11062). The object could be a host galaxy of GRB 100805A.
The photometry is based on USNO-B1.0 star 1426-0390273 (J2000) RA= 19 59
29.55 +52 37 19.6 Dec= +52 37 19.6 and assuming R=17.59 is following:
T0+ Filter, Exposure, Obj. mag., Upper Limit
(mid, d) (s)
2.6401 R 68x60 22.5 +/- 0.1 24.0
The combined images can be found
http://grb.rssi.ru/GRB100805A/GRB100805a_100807_R_ZTSh.gif
Our observation and photometry is in some contradiction with observation
reported in GCN 11076 (Moskvitin et al.)
