GCN Circular 14489
Subject
GRB 130427A, Optical Observations
Event
Date
2013-04-28T11:48:15Z (13 years ago)
From
Shashi Bhushan Pandey at ROTSE <shaship@umich.edu>
S. B. Pandey and Brajesh Kumar (ARIES Nainital India, on behalf of larger
Indian GRB collaboration)
We observed Swift GRB 130427A field (Maselli et al., GCN 14448) using 1.04m
telescope at ARIES Nainital on 2013-04-27 starting at 14:25:16 UT in
UBV(RI)_c filters. Several frames were obtained in average sky conditions.
We clearly detect the bright optical counterpart of GRB 130427A (Maselli et
al. GCN 14448, Elenin et al. GCN 14450) in each individual exposures.
The preliminary photometry is as following:
(UT)Start filter exp(sec) mag
14:25:16 B 300 16.61 +/- 0.06
14:53:36 I 200 14.83 +/- 0.05
The photometry was performed in comparison to nearby USNO- B1 stars. Our
observations seem to follow the power-law decay exponent ~ -0.9 as noticed
by Perley and Cenko GCN 14456.
Further observations are going on. This massage may be cited.