[vsnet-grb-info 12873] GRB 130215A: RAPTOR Measurements

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14218
SUBJECT: GRB 130215A: RAPTOR Measurements
DATE:    13/02/15 17:56:46 GMT
FROM:    James Wren at LANL  <jwren at nis.lanl.gov>

J. Wren, W.T. Vestrand, P. Wozniak, and H. Davis,
of Los Alamos National Laboratory report:

The RAPTOR network of robotic optical telescopes made follow-up observations
of Swift trigger 548760 (D'Elia, et al., GCN 14204).  Our narrow-field
instruments in Los Alamos, NM USA, began imaging at 01:43:07.0 UT, 696.8 s
after the Swift BAT trigger.  We detect the optical counterpart initially
reported by the ROTSE team (Zheng, et al., GCN 14205).  Our unfiltered images
are calibrated to the USNO-B1 r-band.  The following table gives a sample of
our observations.

T-Start  Exp-Time   Mag +/- error
------------------------------------
696.85     5.0      13.73 +/- 0.014
725.35     5.0      13.70 +/- 0.015
762.35     5.0      13.74 +/- 0.014
796.75     10.0     13.80 +/- 0.009
927.55     10.0     13.98 +/- 0.010
1089.9     30.0     14.13 +/- 0.006