GCN Circular 23649
Subject
GRB190109A: MITSuME Akeno optical upper limits
Date
2019-01-09T12:34:19Z (5 years ago)
From
Motoki Oeda at Tokyo Inst. of Tech. <oeda@hp.phys.titech.ac.jp>
M. Oeda, R. Adachi, K. L. Murata, R. Itoh, Y. Tachibana, S. Harita, K.
Morita, K.Shiraishi, K. Iida, M. Niwano, Y. Yatsu, and N. Kawai (TokyoTech)
report on behalf of the MITSuME collaboration:
We searched for the optical counterpart of GRB 190109A (M. J. Moss et
al.,GCN Circular #23642) 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 08:18:30.05 UT. We did not find any new
point source within the enhanced XRT circle (P.A. Evans et al., GCN
Circular #23643) in all three bands. We obtained following 3 sigma limits
for the magnitudes.
T0+[hour] MID-UT T-EXP[sec] g' Rc Ic
-------------------------------------------------------------------------------------------------------
3.097 8:42:32.91 1140 >16.23 >15.42 >15.34
-------------------------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used GSC2.3 catalog for flux calibration.