[vsnet-grb-info 14104] GRB 131030A: T21 optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15418
SUBJECT: GRB 131030A: T21 optical observations
DATE:    13/10/31 15:45:15 GMT
FROM:    Veli-Pekka Hentunen at Taurus Hill Obs,A95  <veli-pekka.hentunen at kassiopeia.net>

Veli-Pekka Hentunen, Markku Nissinen and Tuomo Salmi (Taurus Hill
Observatory, Varkaus, Finland) report:

We have detected GRB 131030A optical afterglow at iTelescope observatory
T21 (Mayhill, New Mexico). We used 0.43-m/6.8 astrograph and FLI-PL6303E
CCD. Three unfiltered images and three photometric R filter images with 600 sec 
exposure time were made.

The afterglow was detected at the following position RA 23:00:16.17 and 
DEC -05:22:05.0.

The following magnitudes were obtained from the observations using 
NOMAD1 0846-0702870 (R=17.120) as a comparison star:

Tmid(h)+T0       Filter             Exp. time (sec)       Mag            Mag err. 
8.53                  unfiltered       3x600                   18.57CR     0.12
9.26                  R                  3x600                   19.43R        0.24