[vsnet-grb-info 12683] GRB 121128A: Optical Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14043
SUBJECT: GRB 121128A: Optical Observations
DATE:    12/12/04 05:24:30 GMT
FROM:    Shashi Bhushan Pandey at ROTSE  <shaship at umich.edu>

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

We observed GRB 121128A (Swift trigger 539866, Oates et al. 2012, GCN
Circ.14007) field with the 1.04m telescope at ARIES, Nainital starting at
2012-11-28 14:02:55 (UT). Several images in R_c and I_c pass-bands were 
obtained.

The optical afterglow  candidate ( Oates et al. 2012, GCN Circ.14007,
Japelj 
et al. 2012, GCN Circ. 14008) was clearly detected in our frames. The
preliminary photometry of the co-added R_c (300sec x 3) and I_c (300sec x
3) frames yield following magnitudes.

--------------------------------------------------------------------------
Time (MID-UT)                Exp (sec)           Filter      Magnitude
--------------------------------------------------------------------------
2012-11-28, 14:12:11           900                 R_c      20.35 +/- 0.05
2012-11-28, 14:55:40           900                 I_c      19.65 +/- 0.11
--------------------------------------------------------------------------

Nearby USNO stars have been used for calibration.

This massage may be cited.