[vsnet-grb-info 17023] GRB 150912A: MITSuME Ishigakijima upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  18304
SUBJECT: GRB 150912A: MITSuME Ishigakijima upper limits
DATE:    15/09/14 00:44:10 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 150912A (Mereghetti et al., GCNC 18291)
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 2015-09-12 12:15:39 UT (~1.6 h after the burst).
We did not find any new point source within the INTEGRAL-IBAS error circle
(Mereghetti et al., GCNC 18291) in all the three bands.

Three sigma upper limits of the OT are listed below.
We used GSC2.3 catalog for flux calibration.

#T0+[day]  MID-UT    T-EXP[sec]   g'     Rc     Ic
-----------------------------------------------------
0.07014    12:18:30     300.0   >19.7  >19.4  >18.6
-----------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]