GCN Circular 17232
Subject
GRB 141225A: Optical aftergow confirmation
Date
2014-12-26T00:05:51Z (9 years ago)
From
Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <malesani@dark-cosmology.dk>
D. Malesani (DARK/NBI), T. Augusteijn (NOT), and P. Jakobsson (Univ.
Iceland) report on behalf of a larger collaboration:
We observed the field of GRB 141225A (D'Avanzo et al., GCN 17229) with
the Nordic Optical telescope equipped with the MOSCA camera.
Observations started at 23:25:08 UT (0.40 hr after the GRB trigger) and
were conducted in the SDSS r band.
Consistent with the XRT position (see
http://www.swift.ac.uk/xrt_positions/), we detect a bright source not
present in the DSS, which is likely the optical afterglow of GRB
141225A. Its coordinates are (J2000):
RA = 09:15:06.89
Dec = +33:47:30.8
and an approximate magnitude of R ~ 19.5 (Vega; assuming R = 16.2 for
the USNO star at RA = 09:15:09.46, Dec = +33:47:48.7).
This is the same source reported by Gorosabel et al. (GCN 17230) and
Guidorzi et al. (GCN 17231).