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GCN Circular 14618

Subject

GRB 130508A: MITSuME Akeno upper limits

Date

2013-05-10T13:04:03Z (11 years ago)

From

Yoichi Yatsu at Tokyo Tech. <yatsu@hp.phys.titech.ac.jp>

Y. Saito, Y. Yano, R. Usui, Y. Tachibana, K. Ito, T. Yoshii,
S. Kurita, Y. Yatsu, and N. Kawai (Tokyo Tech)
report on behalf of the MITSuME collaboration:

We observed the field of GRB 130508A (Holland et al., GCNC 14607) 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 2013-05-08 17:10:32 UT ( ~99 sec after
the burst). And we could not find any new point source within the XRT
error circle (Holland et al., GCNC 14607) in all the three bands.

The results of photometry (3 sigma upper limits) are listed below.
We used GSC2.3 catalog for flux calibration.


T0+[sec]   MID-UT   T-EXP[sec]    g'           Rc          Ic
------------------------------------------------------------
-------------------------------
    283      17:13:30      240      >19.4   >19.1   >18.0
   2803      17:55:30     4320      >20.7   >20.4   >19.1
------------------------------------------------------------
-------------------------------
T0+ : Elapsed time after the burst [sec]
T-EXP: Total Exposure time [sec]