[vsnet-grb-info 15766] GRB 141109B: MITSuME Akeno upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17054
SUBJECT: GRB 141109B: MITSuME Akeno upper limits 
DATE:    14/11/10 14:46:44 GMT
FROM:    Taketoshi Yoshii at Tokyo Tech  <yoshii.t.ac at m.titech.ac.jp>

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

We observed the field of GRB 141109B (A.Melandri et al., GCN Circular #17038) 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 2014-11-09 18:57:42.8 UT (~11.2h after the burst).
We did not find any new point source within XRT circle in all three bands.

The measured magnitudes are listed below.

T0+[sec]      MID-UT      T-EXP[sec]         g'           Rc           Ic
---------------------------------------------------------------------------------------
  40320     19:52:29.1          780           >19.4      >19.0     > 18.4
---------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst 
T-EXP: Total Exposure time 
We used GSC2.3 catalog for flux calibration.