GCN Circular 14200
Subject
GRB 121123A: optical observations
Date
2013-02-13T16:34:45Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
Yu. Krugly (Institute of Astronomy of Kharkiv National University),
R.Inasaridze, O. Kvaratskhelia(Abastumani Astrophysical Observatory),
I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB
follow-up collaboration:
We observed the field of the Swift GRB 121123A (Helder et al., GCN
13982) with AC-32 (0.7m Maksutov) telescope of Abastumani Observatory,
starting on Nov. 23 (UT) 15:18. We took several unfiltered images of 180
s exposure. We clearly detected the afterglow (Helder et al., GCN 13982;
Zhao et al., GCN 13983) in every single image. The photometry of the
stacked images is based on USNO-B1.0 stars (R2):
Start, T0+, Filter, Exp., OT
(UT) (mid),days
15:18:28 0.2229 none 4x180 19.01 +/- 0.10
15:33:10 0.2337 none 4x180 18.96 +/- 0.09
15:48:15 0.2448 none 4x180 18.88 +/- 0.08
16:02:57 0.2551 none 4x180 19.17 +/- 0.11
16:02:57 0.2642 none 4x180 18.94 +/- 0.10
16:28:40 0.2729 none 4x180 19.06 +/- 0.11