GCN Circular 16498
Subject
GRB 140629A: additional P60 observations
Event
Date
2014-07-01T06:22:11Z (11 years ago)
From
Daniel Perley at Caltech <dperley@astro.caltech.edu>
D. A. Perley (Caltech) and S. B. Cenko (NASA/GSFC) report:
We acquired additional imaging of the afterglow of GRB 140629A (Lien et
al., GCN 16477; Yurkov et al. GCN 16478) with the Palomar 60-inch (P60)
robotic telescope on UT 2014-07-01 between 04:23 and 04:52, acquiring
9x180s exposures in the r' filter. We measure a magnitude of:
r = 22.92 +/- 0.14 (t_mid = 1.598 days)
This indicates a relatively rapid decay index of alpha=1.87 since our
observation the previous night (see also Garnavich and Rose, GCN 16492).