[vsnet-grb-info 6260] GRB080613B: MITSuME upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7886
SUBJECT: GRB080613B: MITSuME upper limits
DATE:    08/06/17 23:33:43 GMT
FROM:    Michitoshi Yoshida at Okayama Astrophysical Obs  <yoshida at oao.nao.ac.jp>

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

We performed optical imaging observation (g', Rc, and Ic) of the
field of GRB 080613B (Markwardt et al. GCN 7873) with 50cm MITSuME
telescope at Okayama Astrophysical Observatory from 11:19:09 UT
(6m 31s after the trigger) to UT 12:43:30 on June 13 2008.

We could not identify any new source in the XRT error circle
(Mao et al. GCN7875). Three sigma limiting magnitudes of our
observation are listed below.


Observation date: 2008-06-13 UT

Start-UT   mid-UT    exp-T    g'      Rc      Ic
----------------------------------------------------
11:19:09   11:31:16  10min    >18.4   >18.3   >18.0
11:31:26   12:07:28  60min    >18.7   >18.4   >18.1
----------------------------------------------------