GCN Circular 11012
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.