GCN Circular 14148
Subject
GRB 130122A: optical observations
Date
2013-01-24T10:05:37Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (SAI MSU/IKI), V. Linkov (ISON-Kislovodsk), I. Molotov (KIAM),
V. Kouprianov (GAO), A. Pozanenko (IKI), report on behalf of larger
collaboration:
We observed the field of GRB 130122A (Lien et al., GCN 14140) with
SANTEL-400AN (0.4-m f/3) telescope of ISON-Kislovodsk observatory.
Observations started on Jan. 22 (UT) 23:44 and we obtained several
unfiltered images of 60 s and 100 s exposures. Initial part of our
observations were carried under unfavorable weather conditions. Starting on
Jan.23 (UT) 00:14:14 we clearly detect optical afterglow of GRB 130122A
(Lien et al., GCN 14140; Sonbas et al., GCN 14141; Gorbovskoy et al., GCN
14142) in single images of 60 s exposure. A preliminary photometry of
stacked images is based on USNO-B1.0 (R2) nearby stars:
T_start, T0+, Exp, Filter, OT
(UT) mid (d) (s)
00:14:14 0.00899 8x60 none 18.0 +/-0.1
00:47:45 0.04474 100 none 18.5 +/- 0.5
01:02:07 0.05579 4x60 none >17.3