[vsnet-grb-info 13765] GRB 130806A: MITSuME Akeno Optical observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15079
SUBJECT: GRB 130806A: MITSuME Akeno Optical observation
DATE:    13/08/07 06:31:51 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 130806A (B.P. Gompertz et al., GCNC 15071) 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 2013-08-06 14:11:23 UT ( ~11.3 h afterthe burst).
And we could not find any new point source within the XRT
error circle (A.P. Beardmore et al., GCNC 15072) in all the three bands.

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


T0+[hour]      MID-UT        T-EXP[sec]           g'                Rc                Ic
----------------------------------------------------------------------------------------------------
   ~15.0         17:50:01          5580               >21.3         >20.4           >19.7
----------------------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst [hour]
T-EXP: Total Exposure time [sec]