GCN Circular 21954
Subject
GRB 171001A: IRSF Observation
Date
2017-10-02T01:07:51Z (7 years ago)
From
Katsuhiro L. Murata at Nagoya U <murata@u.phys.nagoya-u.ac.jp>
R. Itoh (Tokyo Tech), K. L. Murata (Tokyo Tech), K. Morihana (Nagoya U.)
and T. Nagayama (Kagoshima U)
We observed the field of GRB 171001A (Lien et al., GCNCircular #21946) 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 2017-10-01 19:16:51 UT. We detected the
afterglow within the enhanced XRT error circle (Evans et al., GCN Circular
#21952) in J band. The measured magnitudes (Vega magnitude system) were
listed as below.
T0+[min] MID-UT T-EXP[sec] J H
Ks
-------------------------------------------------------------------------------------------------
~48 19: 31 1270 17.0+-1.1 >16.3
>16.0
-------------------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
Given magnitudes were calibrated against 2MASS point sources in this field.
This observation was carried out by IRSF and OISTER collaboration.