GCN Circular 15711
Subject
GRB 131231A: AAO optical observations
Date
2014-01-09T16:06:01Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), R. Inasaridze (AAO), G. Inasaridze (AAO), V.
Zhuzhunadze (AAO), Yu. Krugly (IA KhNU), I. Molotov (KIAM), A. Pozanenko
(IKI) report on behalf of larger GRB follow-up collaboration:
We observed the optical counterpart of the Fermi/LAT GRB 131231A
(Sonbas et al., GCN 15640; Xu et al. GCN 15641) with AS-32 (0.7m)
telescope of Abastumani Observatory on Jan. 3, 4, and 5. We obtained
several unfiltered images of 120 s exposure during each observational
set. On stacked images we clearly detect the afterglow. The photometry
based on the reference stars, R-mag, from Halpern (GCN 15646) is following:
Date T_start t-t0, exp, OT
(UT) mid, d s
2014-01-03 17:08:16 3.54893 33x120 20.26 �� 0.06
2014-01-04 16:53:04 4.53207 29x120 20.32 �� 0.08
2014-01-05 15:59:46 5.50061 34x120 20.74 �� 0.13