[vsnet-grb-info 13641] GRB 130701A: MITSuME Akeno Optical observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14963
SUBJECT: GRB 130701A: MITSuME Akeno Optical observation
DATE:    13/07/02 11:43:41 GMT
FROM:    Taketoshi Yoshii at Tokyo Tech  <yoshii.t.ac at m.titech.ac.jp>

T. Yoshii, K. Ito, Y. Saito, Y. Yano, R. Usui, Y. Tachibana, 
S. Kurita, Y. Yatsu, and N. Kawai (Tokyo Tech)
report on behalf of the MITSuME collaboration:

We observed the field of GRB 130701A (N. P. M. Kuin et al., GCNC 14953) with the 
optical three color (g, Rc, and Ic) CCD cameras attached to the MITSuME 50 cm
telescope of Akeno Observatory, Yamanashi, Japan.

The observation started on 2013-07-01 14:33:09 UT ( ~10.3 h after
the burst). And we could not find any new point source within the XRT
error circle (N. P. M. Kuin et al., GCNC 14953) in all the three bands.

The results of photometry (3 sigma upper limits) are listed below.
We used GSC2.3 catalog for flux calibration.


band     T0+[hour]     MID-UT        T-EXP[sec]     magnitude
--------------------------------------------------------------------------------------------
g'             ~13.0           17:19:49         1680               >19.2
Rc           ~13.1           17:24:36         2880               >18.9
Ic             ~13.0           17:17:28         1320              >18.0
--------------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst [hour]
T-EXP: Total Exposure time [sec]