[vsnet-grb-info 13706] GRB 130722A: MITSuME Okayama upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15021
SUBJECT: GRB 130722A: MITSuME Okayama upper limits
DATE:    13/07/23 00:58:08 GMT
FROM:    Daisuke Kuroda at OAO/NAOJ  <dikuroda at oao.nao.ac.jp>

D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ),
S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto)
and N. Kawai(Tokyo Tech)
report on behalf of MITSuME collaboration:

We observed the field of GRB 130722A (Troja et al., GCNC 15013)
with the optical three color (g', Rc and Ic) CCD camera attached
to the MITSuME 50cm telescope of Okayama Astrophysical Observatory.

The observation started on 2013-07-22 11:15:06 UT (~2.9 h after the burst).
We could not detect the previously reported afterglow
(Melandri et al., GCNC 15015; Trotter et al., GCNC 15017) in all the three bands.

Three sigma upper limits of the OT are listed below.
We used GSC 2.3 catalog for flux calibration.

#T0+[day]  MID-UT    T-EXP[sec]   g'     Rc     Ic
-----------------------------------------------------
0.23056    13:51:20    9000.0   >18.7  >18.8  >18.3
-----------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]