GCN Circular 15188
Subject
GRB 130831A: ISON-Kislovodsk optical observations
Date
2013-09-07T23:52:12Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), V. Linkov (ISON), K. Polyakov (ISON), D. Ivanov
(ISON), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of
larger GRB follow-up collaboration:
We observed the afterglow (Hagen et al., GCN 15139; Guidorzi et al.,
GCN 15140) of the Swift GRB 130831A (Hagen et al., GCN 15139) with
SANTEL-400AN telescope of ISON-Kislovodsk observatory starting on
Aug. 31 (UT) 19:12:30. We took several unfiltered images. Preliminary
photometry of combined images is following
T_start T0+ Filter, Exposure, OT, OT_err
(UT) (mid, d) (s)
2013-08-31T19:12:30 0.26113 none 840 18.32 0.08
2013-08-31T19:28:20 0.27212 none 840 18.44 0.10
2013-08-31T19:47:24 0.29470 none 1760 18.47 0.13
The photometry is based on reference stars SDSS-DR9, (R mag,
transformation by Lupton 2005)
N SDSS id R(Lupton)errR
1 J235443.71+292539.3 13.491 0.016
2 J235438.60+292547.3 14.136 0.015
3 J235423.64+292452.8 17.120 0.016