[vsnet-grb-info 14187] GRB 131030A, Optical Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15501
SUBJECT: GRB 131030A, Optical Observations
DATE:    13/11/18 11:03:11 GMT
FROM:    Shashi Bhushan Pandey at ROTSE  <shaship at umich.edu>

S. B. Pandey, Brajesh Kumar and Y. C. Joshi (ARIES Nainital
India, on behalf of larger Indian GRB collaboration)

We observed the Swift GRB 131030A field ( (Troja et al., GCN#15402) using
1.3m DFOT telescope at Devasthal, operated by ARIES Nainital, India. The
observations were started at 16:25:47 UT on 2013-10-31. Two frames in
each R_c and I_c bands with an exposure time of 300s each were obtained
in good seeing conditions.

In our individual frames, we clearly detect the optical counterpart of
GRB 131030A (GNC circular 15403, 15405, 14506, 15410). The
preliminary photometry of co-added R_c (300sec x 2) and
I_c (300sec x 2) frames yields following.

.................................................................
Time (MID-UT)  Exp (sec)  Filter   Magnitude
.................................................................
2013-10-31, 16:46:39 600    R_c 20.13 +/- 0.04
2013-10-31, 16:33:09 600     I_c 19.49 +/- 0.06
..................................................................

The photometry was performed in comparison to nearby USNO- B1
stars. This message may be cited.