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GCN Circular 18765

GRB 151229A: MITSuME Akeno optical upper limits
2015-12-30T07:08:42Z (8 years ago)
Taketoshi Yoshii at Tokyo Tech <>
Y.Saito, T.Fujiwara, T. Yoshii, Y. Tano, Y. Tachibana,
Y.Ono, S.Harita, Y.Muraki, Y. Yatsu, and N. Kawai (Tokyo Tech)
report on behalf of the MITSuME collaboration:

We searched for the optical counterpart of GRB 151229A (D. Kocevski et al., GCN Circular #18745) 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 2015-12-29 08:56:00 UT (~2.1 h after the burst).
We did not find any new point source within XRT circle in all three bands.

We obtained following limits for the magnitudes.

T0+[sec]    MID-UT      T-EXP[sec]           g'            Rc                Ic
7533       09:20:52            2700           > 19.5        > 19.4        > 18.6
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used GSC2.3 catalog for flux calibration.
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