GCN Circular 18551
Subject
GRB 151031A: MITSuME Akeno optical upper limits
Date
2015-11-02T10:02:14Z (9 years ago)
From
Taketoshi Yoshii at Tokyo Tech <yoshii.t.ac@m.titech.ac.jp>
T.Fujiwara, T. Yoshii, Y. Saito, Y. Tachibana, Y. Yano,
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 151031A (E. Sonbas et al., GCN Circular #18538) 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 2015-10-31 16:18:19 UT (10.5 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
----------------------------------------------------------
37669 17:00:37 4440 > 18.8 > 18.9 > 18.3
----------------------------------------------------------
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used GSC2.3 catalog for flux calibration.