[vsnet-grb-info 16297] GRB 150314A: MITSuME Akeno upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17578
SUBJECT: GRB 150314A: MITSuME Akeno upper limits 
DATE:    15/03/14 14:14:18 GMT
FROM:    Taketoshi Yoshii at Tokyo Tech  <yoshii.t.ac at m.titech.ac.jp>

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

We searched for the optical counterpart of GRB 150314A (L. M. Z. Hagen et al., GCN Circular #17573) 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 at 2015-03-14 05:21:32 UT (~5.4 h after the burst).
We could not find any new point source within the refined XRT-UVOT alignment error circle 
(A.P. Beardmore et al., GCN Circular #17575) in all the three bands.

The obtained upper-limits are listed below.

T0+[sec]     MID-UT    T-EXP[sec]        g'         Rc        Ic
-----------------------------------------------------------------------------
19292        11:19:44        6840          >21.6  >21.1  >20.1
-----------------------------------------------------------------------------
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used GSC2.3 catalog for flux calibration.