GCN Circular 13833
Subject
GRB 121001A: possible optical counterpart
Event
Date
2012-10-01T20:32:27Z (14 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
M. Andreev, A. Sergeev (Terskol Branch of Institute of Astronomy), A.
Pozanenko (IKI) on behalf of larger GRB follow up collaboration report:
We observed field of the Swift GRB 121001A = Swift trigger 535026 (D'Elia
et al. GCN 13831) with Zeiss-600 telescope of Mt.Terskol observatory in R
filter starting on Oct. 01 (UT) 18:39:20. In a stacked image of first 13x60
exposures we detect optical source in coordinates (J2000) RA=18 24 07.8
Dec=-05 39 55.3 which is consistent with XRT error circle (GCN 13831). The
optical source is absent in DSS2 plates. However at that time we cannot
determine if the source is variable. Preliminary photometry of the source
against nearby USNO B1.0 stars is 19.5R. Finding chart can be found at
http://grb.rssi.ru/GRB121001A/GRB121001A_R_Z600_fc_1.png