GCN Circular 14511
Subject
GRB 130427A: Challis Observatory optical observations
Date
2013-04-30T03:59:05Z (11 years ago)
From
Jay Norris at Boise State U. <jnorris@custertel.net>
Jay Norris, Daryl Macomb (Boise State U.) report:
We observed GRB 130427A with the Challis Observatory's 0.4-m telescope
(114.33 deg W, 44.5 deg N, 2165 m elevation) on April 29, 05:58 to 06:22 UT.
Using seventeen 10-second frames in the R filter acquired in a clear sky,
centered at ~ 06:06 UT, 22.3 hours after the Swift/BAT trigger (GCN 14448),
we clearly detected the optical afterglow.
Comparison with six stars in the field of view (R = 15.5 to 16.8 mag)
yielded an estimate of R = 17.6 mag for the afterglow with uncertainty
of ~ 0.15 mag. Further observations were interrupted by clouds.
[GCN OPS NOTE(30apr13): Per author's request, the affiliation in the FROM-line
was changed to Boise State U.]