[vsnet-grb-info 9724] GRB 100902A: optical observation at Mt.Terskol

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11192
SUBJECT: GRB 100902A: optical observation at Mt.Terskol
DATE:    10/09/03 11:20:36 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

M. Andreev, A. Sergeev (Terskol Branch of Institute of Astronomy) and 
A.Pozanenko (IKI) on behalf of larger GRB follow up collaboration report:

We observed  the field of the Swift GRB 100902A (Sakamoto  et al, GCN 11181) 
with the Z-600 telescope of Mt.Terskol observatory in R-filter between (UT) 
00:52:20 - 01:26:40. In enhanced XRT error circle (Beardmore et al, GCN 
11188) we do not detect  any object. The object at distance of 4" from the 
center of the enhanced  XRT error circle (Beardmore et al, GCN 11188) in 
coordinates (J2000) RA =03 14 31.35 Dec= +30 58 44.8 with uncertainty of 1" 
is detected at magnitude R ~ 20 and upper limit of stacked image of R=21 (3 
sigma). At present time we cannot confirm variability of the object.

The finding chart can be found at
http://grb.rssi.ru/GRB100902A/GRB100902A_R_Z600.jpg