[vsnet-grb-info 17538] GRB 160131A: MITSuME Ishigakijima Optical Observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  18968
SUBJECT: GRB 160131A: MITSuME Ishigakijima Optical Observation
DATE:    16/02/01 02:05:16 GMT
FROM:    Daisuke Kuroda at OAO/NAOJ  <dikuroda at oao.nao.ac.jp>

D. Kuroda (OAO, NAOJ),  H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ),
K. Yanagisawa (OAO, NAOJ), S.Nagayama (NAOJ), M. Yoshida (Hiroshima),
K. Ohta (Kyoto) and N. Kawai(Tokyo Tech)
report on behalf of the MITSuME and OISTER collaboration:

We observed the field of GRB 160131A (Pagani and Barthelmy, GCNC 18951)
with the optical three color (g', Rc and Ic) CCD camera attached
to the Murikabushi 1m telescope of Ishigakijima Astronomical
Observatory.

The observation started on 2016-01-31 14:06:17 UT (~5.8 h afterthe burst).
We detected the previously reported afterglow (Pagani and Barthelmy, GCNC 18951;
Yurkov et al., GCNC 18952; Guidorzi et al., GCNC 18953) in all the three bands.

Photometric results of the OT are listed below.
We used GSC2.3 catalog for flux calibration.

#T0+[day]  MID-UT    T-EXP[sec]   g'   g'_err  Rc   Rc_err  Ic   Ic_err
-----------------------------------------------------------------------
0.24373    14:11:29     540.0    17.92 0.09   17.19 0.05   16.88 0.06
-----------------------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]