[vsnet-grb-info 10240] GRB 110201A: optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Thu Feb 10 19:58:05 JST 2011
TITLE: GCN CIRCULAR
NUMBER: 11688
SUBJECT: GRB 110201A: optical observations
DATE: 11/02/10 10:58:01 GMT
FROM: Alina Volnova at SAI MSU <alinusss at gmail.com>
V. Rumyantsev (CrAO), A. Pozanenko (IKI), A. Volnova (SAI MSU), E.
Klunko (ISTP) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 110201A (Siegel et al., GCN
11622) with Shajn telescope of CrAO in filter R between Feb. 01 (UT)
17:01 - 18:04, and with AZT-33IK telescope between Feb. 01 (UT) 16:31
- 17:07. Using stacked image of CrAO observations we detect a diffuse
source (A) at ~4" offset of a center of the XRT error circle (Siegel
et al., GCN 11622), see also http://www.swift.ac.uk/sper/444230/. The
coordinates of the center of the source (A) are (J2000) RA =
09:10:29.84, Dec = +88:36:17.5 with uncertainty of 0.5" in both
coordinates.
The photometry of the source is based on the USNO-B1.0 star
1786-0003311 (09:12:09.70 +88:36:01.0) assuming R=17.64 is following:
T0+ Filter, Exposure, source A, mag, UpperLimit
(mid, d) (s)
0.3305 R 45x60 21.9 +/- 0.1 23.4
Would be the source (A) a host galaxy of GRB 110201A, the galaxy could
be a relatively close (z <1) taking into account its brightness.
The finding chart can be found at
http://grb.rssi.ru/GRB110201A/GRB110201a_110201_R_ZTSh.gif
More information about the vsnet-grb-info
mailing list