GCN Circular 15642
Subject
GRB 131231A: afterglow confirmation from the NOT
Date
2013-12-31T23:02:02Z (10 years ago)
From
Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <malesani@dark-cosmology.dk>
D. Malesani, D. Xu (DARK/NBI), I. R. Losada (Stockholm), F. Duval
(Stockholm), report on behalf of a larger collaboration:
We observed the afterglow candidate of GRB 131231A (Sonbas et al., GCN
15640; Xu et al., GCN 15641) using the 2.56m Nordic Optical Telescope
(NOT) equipped with MOSCA. Observations started at 22:05:40 UT on 2013
Dec 31 (i.e., 17.3 hr after the Fermi trigger).
The afterglow candidate noted by Xu et al. (GCN 15641) has decayed to
R=18.6, using the same calibration. We thus suggest that this source is
very likely the afterglow of GRB 131231A. The coordinates of the
afterglow can be refined to
R.A. = 00:42:21.665
Dec. = -01:39:10.61
with an error of 0.3".
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