[vsnet-grb-info 13401] GRB 130603A: MITSuME Okayama Optical Observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14734
SUBJECT: GRB 130603A: MITSuME Okayama Optical Observation
DATE:    13/06/03 14:05:22 GMT
FROM:    Daisuke Kuroda at OAO/NAOJ  <dikuroda at oao.nao.ac.jp>

D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (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 130603A (Melandri et al., GCNC 14731)
with the optical three color (g', Rc and Ic) CCD camera attached
to the MITSuME 50cm telescope of Okayama Astrophysical Observatory.

The observation started on 2013-06-03 11:14:06 UT (~5.2 h after the burst).
We detected the previously reported afterglow (Melandri, GCNC 14732)
in all the three bands.

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

#T0+[day]  MID-UT    T-EXP[sec]   g'  g'_err   Rc  Rc_err   Ic  Ic_err
-----------------------------------------------------------------------
0.22890    11:29:09    1560.0    18.3  0.3    18.4  0.2    18.1  0.3
0.24993    11:59:26    1500.0    18.9  0.3    18.8  0.2    18.2  0.3
------------------------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]