GCN Circular 16173
Subject
GRB 140423A: MITSuME Akeno Optical observation
Date
2014-04-25T14:28:40Z (10 years ago)
From
Taketoshi Yoshii at Tokyo Tech <yoshii.t.ac@m.titech.ac.jp>
T. Fujiwara, T. Yoshii, Y. Saito, Y. Tachibana, H. Ohuchi,
S. Kurita, Y.Ono , Y. Yatsu, and N. Kawai (Tokyo Tech)
report on behalf of the MITSuME collaboration:
We observed the field of GRB 140423A (E. Sonbas et al., GCN Circular #16142) 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 2014-04-23 12:38:42 UT (4.1h after the burst).
We detected the previously reported optical afterglow of GRB140423A (D.Kuroda et al., GCN Circular #16160) in the Rc and Ic band.
The measured magnitudes were listed below.
T0+[sec] MID-UT T-EXP[sec] g' Rc Ic
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19710 14:00:28 7740 20.49+/-0.23 19.83+/-0.15 19.72+/-0.22
31955 17:24:28 7560 >21.3 20.35+/-0.19 19.89+/-0.23
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T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used GSC2.3 catalog for flux calibration.