[vsnet-grb-info 13162] GRB 130427B: MITSuME Ishigakijima upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14499
SUBJECT: GRB 130427B: MITSuME Ishigakijima upper limits
DATE:    13/04/29 06:41:41 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 collaboration:

We observed the field of GRB 130427B (Maselli et al., GCNC 14460)
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 2013-04-28 18:47:24 UT (~1.23 days after the burst).
We did not find any new point source within the enhanced XRT circle
(Osborne et al., GCNC 14467) 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
-----------------------------------------------------
1.25418    19:26:42    3540.0   >20.6  >20.7  >20.1
-----------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]