[vsnet-grb-info 14965] GRB 140508A: MITSuME Akeno Optical observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16259
SUBJECT: GRB 140508A: MITSuME Akeno Optical observation
DATE:    14/05/13 13:52:06 GMT
FROM:    Taketoshi Yoshii at Tokyo Tech  <yoshii.t.ac at m.titech.ac.jp>

T. Fujiwara, T. Yoshii, Y. Saito, Y. Tachibana, H. Ohuchi,
S. Kurita, Y.Ono , Y. Yatsu, and N. Kawai (Tokyo Tech)
report on behalf of the MITSuME collaboration:

We observed the field of GRB 140508A (H.Yu et al., GCN Circular #16224) 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 2014-05-09 11:07:31 UT (32.1h after the burst).
We detected the optical afterglow of GRB140508A in the g',Rc and Ic band.

The measured magnitudes were listed below.

T0+[h]         T-EXP[sec]               g'                Rc              Ic
----------------------------------------------------------------------------------------
 35.3            19800             20.16+/-0.22      19.74+/-0.24    18.85+/-0.17
----------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst 
T-EXP: Total Exposure time 
We used GSC2.3 catalog for flux calibration.