GCN Circular 13761
Subject
GRB 120907A: optical observations of ISON-Kislovodsk
Date
2012-09-13T18:53:47Z (12 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
V. Nevski (ISON-Kislovodsk Observatory), A. Volnova (SAI MSU/IKI), I.
Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger
collaboration:
We observed the field of GRB 120907A (Racusin et al., GCN 13716) with
Santel-400AN (0.4-m f/3) telescope �f ISON-Kislovodsk observatory starting
on Sep. 07 (UT) 00:34:32, i.e. ~10.2 minutes after burst trigger. We took
several unfiltered images of 30 s and 60 s exposures. In a stacked images
we clearly detect optical afterglow of GRB 120907A (Racusin et al., GCN
13716; Gorbovskoy et al., GCN 13718; Kruehler et al., GCN 13719). A
preliminary photometry of stacked frames is based on the USNO-B1.0 (R2)
nearby stars:
T_start, T0+, Exp, Filter, OT
(UT) mid (d) (s)
00:34:32 0.00899 10x30 none 18.55+/-0.09
00:51:45 0.02120 5x60 none 18.95+/-0.13
00:58:09 0.02980 8x60 none 19.52+/-0.20
01:16:32 0.04339 8x60 none 19.50+/-0.20