[vsnet-grb-info 12996] GRB 130327A: PAIRITEL NIR Afterglow Candidate

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14333
SUBJECT: GRB 130327A: PAIRITEL NIR Afterglow Candidate
DATE:    13/03/27 03:39:24 GMT
FROM:    Adam Morgan at U.C. Berkeley  <qmorgan at gmail.com>

A. N. Morgan (UC Berkeley) reports:

We observed the field of GRB 130327A (Ukwatta et al., GCN 14331) with the
1.3m PAIRITEL located at Mt. Hopkins, Arizona. Observations began at
2013-Mar-27 02h21m22s UT, ~33.8 minutes after the Swift trigger.  In
mosaics (effective exposure time of ~25 m) taken simultaneously in the J,
H, and Ks filters, we marginally detect a source in the J band within the
XRT error circle (Ukwatta et al., GCN 14331).  Given the minor significance
of the detection in only a single filter, deeper observations are
encouraged to confirm if this possible source is indeed the afterglow of
GRB 130327A.

post burst
t_mid (hr) exp.(hr) filt  Mag
0.91       0.42     J     17.8 +/- 0.4
0.91       0.42     H     > 17.1
0.91       0.42     Ks    > 15.7


All magnitudes are given in the Vega system, calibrated to 2MASS. No
correction for Galactic extinction has been made to the above reported
values.  Observations are ongoing.