GCN Circular 1652
Subject
GRB021004: Optical Observations
Date
2002-10-24T06:39:12Z (22 years ago)
From
Grant Williams at Steward Observatory <gwilliams@as.arizona.edu>
G. Williams (MMTO/SAO), K. Lindsay (Clemson University), P. Milne (LANL)
We observed the optical afterglow of GRB021004 (Fox et al., GCN 1564) with
the Steward Observatory 90-inch Bok Telescope. We obtained 8 x 300s
exposures in each of the B, V, R, and I bands. Observations began at
04:19:49 UT, and ended at 07:39:15 UT, on 12 October 2002 (T + 7.67 - 7.82
days). Aperture photometry was performed on the coadded images and the
results were calibrated utilizing standards reported by Henden et al., GCN
1583. The following preliminary results were obtained:
B = 22.60 +- 0.11 (12 Oct 07:18 UT)
V = 21.95 +- 0.07 (12 Oct 06:23 UT)
R = 21.47 +- 0.09 (12 Oct 04:41 UT)
I = 21.23 +- 0.18 (12 Oct 05:31 UT)
This report may be cited.