[vsnet-grb-info 15515] GRB 140907A: Nishi-Harima NIR Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16804
SUBJECT: GRB 140907A: Nishi-Harima NIR Observations
DATE:    14/09/09 07:55:31 GMT
FROM:    Akira Arai at Nishi-Harima Astro. Obs/U of Hyogo  <arai at nhao.jp>

J. Takahashi, A. Arai, S. Honda, Y. Takagi,  K. Morihana (Univ. of Hyogo)
report on behalf of Nayuta team and OISTER collaboration:

We observed the field of GRB 140907A (H. A. Krimm et al., GCN 16788)
with Nishiharima Infrared Camera (NIC) attached to the Nayuta 2-m
telescope at the Nishi-Harima Astronomical Observatory.

The observations were started at 19:00 UT on 2014-09-07.
We detected the near-infrared afterglow in J, H and Ks bands.

Photometric results of our observations are shown below.
We used 2MASS 03123451+4635419, 03123283+4635411, and 03123016+4635375
as reference stars for photometry.

# MID-UT  Tmid-T0 T-EXP  J_mag    H_mag    Ks_mag
-----------------------------------------------------------------------
19:07:32    3.0    600   17.5 +/- 0.2   17.0 +/- 0.1   16.6 +/- 0.3
------------------------------------------------------------------------
Tmid-T0: Elapsed time after the burst (hours)
T-EXP: Total Exposure time (seconds)