[vsnet-grb-info 9541] GRB 100728B: optical detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Wed Jul 28 21:13:32 JST 2010
TITLE: GCN CIRCULAR
NUMBER: 11012
SUBJECT: GRB 100728B: optical detection
DATE: 10/07/28 12:13:28 GMT
FROM: Alexei Pozanenko at IKI, Moscow <apozanen at 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 Ïf 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.
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