GCN Circular 4240
Subject
GRB 051109A: KAIT optical observations
Date
2005-11-10T05:42:17Z (19 years ago)
From
Weidong Li at UC Berkeley KAIT/LOSS <weidong@astron.berkeley.edu>
W. Li, University of California, Berkeley, on behalf of the
KAIT GRB team, report:
We remotely observed GRB 051109A (Tagliaferri et al., GCN 4213)
with the 0.76-m Katzman Automatic Imaging Telescope (KAIT) at
Lick Observatory, and detected the afterglow (Rykoff et al., GCN 4211)
in a series of unfiltered exposures. The following photometry
are measured (calibrated to the USNO B1.0 catalog):
Start UT Exp(s) mag err
2005-11-09 02:25:48 120.0 18.67 0.04
2005-11-09 02:28:28 120.0 18.73 0.06
2005-11-09 02:31:05 240.0 18.75 0.05
2005-11-09 02:35:37 240.0 18.82 0.04
2005-11-09 02:40:14 360.0 18.80 0.04
2005-11-09 02:46:48 360.0 18.88 0.04
2005-11-09 02:53:27 600.0 18.93 0.04
Within this period (74.5 to 106.1 minutes after the burst),
the afterglow declined with a power-law decay index of
-0.62 +/- 0.07, consistent with the result resported by Mirabal
et al. (GCN 4215).