GCN Circular 15214
Subject
GRB 130912A: GROND observations
Date
2013-09-12T11:49:50Z (11 years ago)
From
Vladimir Sudilovsky at MPE <vsudilov@mpe.mpg.de>
M. Tanga (MPE Garching), S. Klose (TLS Tautenburg), V. Sudilovsky
(MPE Garching), R. Filgas (IEAP Prague), J. Greiner (MPE Garching)
report on behalf of the GROND team:
We observed the field of GRB 130912A (Swift trigger 570465; D'Elia et al.
2013, GCN #15212) simultaneously in g'r'i'z'JHK with GROND (Greiner et al.
2008, PASP 120, 405) mounted at the 2.2 m MPG/ESO telescope at La Silla
Observatory (Chile).
Observations started at 08:50 UT on 12 Sep 2013, 16 min after the GRB
trigger. At the northern edge of the r=2.2 arcsec XRT error circle (D'Elia
et al., GCN #15173) we detect a faint source at coordinates
RA (J2000) = 03:10:22.23
Dec. (J2000) = 13:59:48.7
with an error of 0".3 arcseconds.
However, the object seems to be constant over the first hour of
our observations, with a preliminary magnitude of r' = 22.0+-0.2 mag,
calibrated against the GROND zeropoint. Given the constant flux,
this might be the host galaxy of GRB 130912A.