GCN Circular 6350
Subject
GRB 070411: Late-time Keck imaging
Event
Date
2007-04-25T18:49:50Z (19 years ago)
From
Daniel Perley at U.C. Berkeley <dperley@astro.berkeley.edu>
D. A. Perley, J. S. Bloom, R. J. Foley, and D. Kocevski (UC Berkeley)
report:
On the night of 2007 April 16 (UT) we imaged the field of GRB 070411
(Moretti et al, GCN 6267) with Keck I / LRIS, in a series of g- and
R-band exposures starting at 06:19 UT, 4.42 days after the GRB trigger
under poor seeing conditions. The afterglow (GCN 6267; Kann et al, GCN
6268) is detected in a stacked image. Calibrating relative to the same
USNO-B star used by Garnavich et al (GCN 6346) at RA=7:09:23.35
DEC=1:04:09.98, we measure an afterglow magnitude of R = 24.78 +/- 0.26.