[vsnet-grb-info 13281] GRB 130508A: MITSuME Akeno upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14618
SUBJECT: GRB 130508A: MITSuME Akeno upper limits
DATE:    13/05/10 13:04:03 GMT
FROM:    Yoichi Yatsu at Tokyo Tech.  <yatsu at 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]