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GCN Circular 14534

GRB 130427A: MITSuME Ishigakijima Optical Observation after 5 days
2013-05-03T00:10:46Z (11 years ago)
Daisuke Kuroda at OAO/NAOJ <>
D. Kuroda (OAO, NAOJ),  H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ),
K. Yanagisawa (OAO, NAOJ), S.Nagayama (NAOJ), M. Yoshida (Hiroshima),
K. Ohta (Kyoto) and N. Kawai(Tokyo Tech)
report on behalf of the MITSuME collaboration:

We observed the field of GRB 130427A (Masell et al., GCNC 14448)
with the optical three color (g', Rc and Ic) CCD camera attached
to the Murikabushi 1m telescope of Ishigakijima Astronomical

We detected the previously reported afterglow (Elenin et al., GCNC 14450)
in only Rc-band. The observation started on 2013-05-02 13:08:42 UT
(~5.2 days after the burst).

Photometric result and three sigma upper limits of the OT are listed below.
We used SDSS catalog for flux calibration.

#T0+[day]  MID-UT    T-EXP[sec]   g'   Rc   Rc_err  Ic
5.25248    13:51:30    540.0    >20.7  20.3 0.3   >19.1
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
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