GCN Circular 13679
Subject
GRB 120811C: optical observations
Date
2012-08-18T22:18:42Z (12 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
L. Elenin (KIAM), A. Volnova (SAI MSU), I. Molotov (KIAM), A. Pozanenko
(IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 120811C (Barlow et al., GCN 13622) with
0.45-m telescope of ISON-NM observatory starting on Aug. 12 (UT) 03:25:07.
We took several unfiltered images of 30 s exposures. The optical afterglow
(Denisenko et al., GCN 13623) is marginally detected in co-added frames at
coordinates (J2000) 13:18:43.98 +62:18:03.4 with uncertainty of 0.5 arcsec
in both coordinates. A preliminary photometry of co-added frames is based
on the USNO-B1.0 (R2) nearby stars is following:
T_start, T0+, Exposure, OT, UL (3 sigma)
(UT) mid, d (s)
03:25:07 0.5095 1800 21.5 +/-0.5 21.2