GCN Circular 19999
Subject
GRB 161001A: IRSF upper limits
Date
2016-10-06T04:48:24Z (8 years ago)
From
Katsuhiro L. Murata at Nagoya U <murata@u.phys.nagoya-u.ac.jp>
K. L. Murata (Nagoya University), K. Miyakawa (Tokyo Institute of
Technology), and T. Nagayama (Kagoshima University)
We observed the field of GRB 161001A ( Page et al., GCN Circular #19967)
with the near-infrared (J, H, Ks) simultaneous imaging camera SIRIUS
attached to 1.4 m telescope IRSF ( InfraRed Survey Facility) in Sutherland
observatory, South Africa.
The observations started on 2016-10-01 02:41:46 UT (~ 95 min. after the
burst). We could not detect the afterglow within the enhanced XRT error
circle (Osborne et al., GCN Circular #19969) in the three bands. We have
obtained the following preliminary upper limits (Vega magnitude system):
J > 14.61
H >14.19
Ks > 14.01
Given magnitudes were calibrated against 2MASS point sources in this field.
The upper limits were determined as the magnitudes of the fainter star
within 1 arcmin from the enhanced XRT position.
This observation was carried out by IRSF and OISTER collaboration.