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GCN Circular 13712

Subject

GRB 120802A: optical observations in CrAO

Date

2012-09-04T13:10:16Z (12 years ago)

From

Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>

A. Volnova (SAI MSU/IKI), L. Elenin (KIAM),  V. Rumyantsev (CrAO), 
A.Pozanenko (IKI) report on behalf of  larger GRB  follow-up collaboration:

We observed the field of  GRB 120802A (Holland et al., GCN 13555Not found
 
 
) with 
Shajn telescope of CrAO starting on Aug. 15 (UT) 23:00:26. We took several 
images in R-filter under mean seeing of 2.8".  In a stacked image we do not 
detect the object suggested as optical counterpart of GRB 120802A (Elenin et 
al., GCN 13609Not found
 
 
) up to 22.5 m. Thus we can confirm the object reported in 
(Elenin et al., GCN 13609Not found
 
 
) is most probably is an afterglow of  GRB 120802A. 
A photometry of  the filed is based on nearby USNO-B1.0 (R2) stars:

   T0+,    Filter      Exposure, OT,  UL (3 sigma)
  mid, d                  (s)

13.625    R           3540          n/d         22.5

We are grateful for CCD PL4240 provided by ISON for Shajn telescope.