GCN Circular 11012
Subject
GRB 100728B: optical detection
Date
2010-07-28T12:13:28Z (14 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
L. Elenin (ISON), I. Molotov (ISON), A. Pozanenko (IKI) report on behalf of
larger GRB follow-up collaboration:
We observed the field of the Swift GRB 100728B (Page et al. GCN 11009) with
0.45-m astrograph f/2.8 �f ISON-NM observatory (32d 54' 11.64'', 105d 31'
42. 34'' ) starting July 28 (UT) 10:56:08, i.e. 24 minutes after burst
onset. A few unfiltered 300s exposures were taken before down. In a first
exposures we clearly detect the afterglow at the position (J2000) RA= 02 56
13.48 Dec= +00 16 51.4 which coincides with early afterglow detection
(Perley et al. GCN 11007; Page et al. GCN 11009).
A preliminary photometry of unfiltered exposures against USNO-B1.0 field
stars (R-filter) at 29.3 minutes after burst is 19m.