[vsnet-grb-info 17643] GRB 160225A: MITSuME Akeno Optical Observation
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Fri Feb 26 02:56:35 JST 2016
TITLE: GCN CIRCULAR
NUMBER: 19080
SUBJECT: GRB 160225A: MITSuME Akeno Optical Observation
DATE: 16/02/25 17:53:11 GMT
FROM: Taketoshi Yoshii at Tokyo Tech <yoshii.t.ac at m.titech.ac.jp>
T. Yoshii, Y.Saito, T.Fujiwara, 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 160225A (M. H. Siegel et al., GCN
Circular #19075) 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 2016-01-04 14:24:14 UT (198 sec after the burst) and
we detected the optical counterpart in Rc and Ic band.
The measured magnitudes were listed as follows.
We obtained following limits for the magnitudes.
T0+[sec] MID-UT T-EXP[sec] g' Rc Ic
-------------------------------------------------------------------------------------------------------
378 14:27:14 270 > 19.4 18.2 +/- 0.1 17.1 +/- 0.2
-------------------------------------------------------------------------------------------------------
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used GSC2.3 catalog for flux calibration.
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