GCN Circular 16803
Subject
GRB 140907A: MITSuME Akeno Optical Observation
Date
2014-09-09T07:25:07Z (10 years ago)
From
Taketoshi Yoshii at Tokyo Tech <yoshii.t.ac@m.titech.ac.jp>
Y. Tachibana, Y. Saito, T. Yoshii, 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 observed the field of GRB 140907A (Krimm et al., GCN Circular #16788) 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 2014-09-07 17:05:39 UT (~1 h after the burst).
We detected the previously reported optical afterglow (Xu et al., GCN Circular #16789, Kuin and Krimm, GCN Circular #16791, Kuroda et al., GCN Circular #16793) in the g',Rc and Ic band.
The measured magnitudes are listed below.
T0+[day] MID-UT T-EXP[sec] g' Rc Ic
------------------------------------------------------------------------------
0.04064 17:09:16 360 19.2+/-0.2 18.2+/-0.2 17.3+/-0.1
0.07348 18:07:29 300 >19.2 >18.3 >17.7
------------------------------------------------------------------------------
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used GSC2.3 catalog for flux calibration.