[vsnet-grb-info 9756] GRB100905A: MITSuME Okayama optical upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11224
SUBJECT: GRB100905A: MITSuME Okayama optical upper limits
DATE:    10/09/06 08:57:02 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 the MITSuME collaboration:

We observed the field of GRB 100905A (Marshall et al., GCN 11214)
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 2010-09-05 15:31:18 UT (~23 min after
the burst). We did not find any new point source within the
enhanced XRT error circle (Evans et al., GCNC 11219) in all
the three bands.

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     Ic
------------------------------------------------------
0.09641    17:27:05 10380.0     >20.9  >20.6  >19.7
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]