GCN Circular 11998
Subject
GRB 110503A: PAIRITEL NIR Detection
Date
2011-05-04T06:36:46Z (13 years ago)
From
Adam Morgan at U.C. Berkeley <qmorgan@gmail.com>
A. N. Morgan, and J. S. Bloom (UC Berkeley) report:
We observed the field of GRB 110503A (Stamatikos et al., GCN 11991)
with the 1.3m PAIRITEL located at Mt. Hopkins, Arizona under poor sky
conditions. Observations began at 2011-05-04 02:46:35 UT, ~9.2 hours
after the Swift Trigger. In mosaics (effective exposure time of 1.28
hours) taken simultaneously in the J and H filters, we marginally
detect a source at the optical afterglow location (Stamatikos et al.,
GCN 11991; Leloudas et al., GCN 11994; Kann et al., GCN 11996). Our
preliminary Ks band reduction is corrupted.
The preliminary photometry yields:
post burst
t_mid (hr) exp.(hr) filt mag m_err
10.2 1.28 J 18.19 0.26
10.2 1.28 H 17.86 0.36
All magnitudes are given in the Vega system, calibrated to 2MASS. No
correction for Galactic extinction has been made to the above reported
values.