GCN Circular 4140
Subject
GRB 051021: P200 Ks Observations
Date
2005-10-22T21:41:37Z (19 years ago)
From
S. Bradley Cenko at Caltech <cenko@srl.caltech.edu>
S. Bradley Cenko, Chris Conselice, Kevin Bundy, (Caltech), Derek B. Fox
(Penn State), and Edo Berger (Carnegie), report on behalf of the
Caltech-NRAO-Carnegie GRB collaboration:
"We have imaged the field of GRB 051021 (Yoshida et al., GCN 4116) with
the Wide Field Infrared Camera mounted on the Palomar 200" Hale Telescope.
Our images consisted of 9 x 120 s exposures taken in the Ks filter at a
mean epoch of approximately 22 October 5:24 UT (~ 16 hours after the
burst). We find at best a marginal (< 3-sigma) detection at the location
of the OT (Fox et al., GCN 4120). Our 3-sigma limiting magnitude,
calculated with respect to several 2mass stars in the field, is
approximately Ks > 19.0.
We note that under the standard afterglow model, our result is
inconsistent with the J-band detection reported by Haislip et. al (GCN
4127), and therefore calls into question the interpreration of GRB 051021
as a high redshift event."