GCN Circular 10030
Subject
GRB 091010: optical obsevation
Date
2009-10-17T02:11:22Z (15 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
V. Rumyantsev (CrAO), E. Klunko (ISTP) and A. Pozanenko (IKI) report on
behalf of larger GRB follow-up collaboration:
We observed the field of SuperAGILE GRB 091010 (Donnarumma et al. GCN 10004)
with Shajn telescope of CrAO on Oct. 12 between (UT) 16:55:18 -
18:09:40. In the XRT error circle (Margutti et al. GCN 10006) we detect a
single object at coordinates (J2000) RA: 19 54 39.80 Dec: -22 31 04.71. The
coordinates of the object coincide with OT candidate reported by Rossi et
al. (GCN 1008).
The photometry against nearby USNO-B1.0 stars (0674-0991940 RA:19 54 39.26
Dec: -22 31 29.7 R=18.18, 0674-0991922 RA:19 54 38.07 Dec: -22 31 12.4
R=17.27) is following:
T0+ Filter, Exposure, mag., err.
(d) (s)
2.62 R 71x60 22.40 +/- 0.17
Our photometry confirm the absence of variability of the OT candidate (Rossi
et al.GCN 1008, Guidorzi et al.GCN 10027). However the object looks like
extended in E-W direction, and can be a candidate in a host galaxy of GRB
091010.
The combined image can be found in
http://grb.rssi.ru/GRB091010/GRB091010_091012_R_ZTSh.gif
