[vsnet-grb-info 10080] GRB 110106A: MITSuME Okayama optical upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11535
SUBJECT: GRB 110106A: MITSuME Okayama optical upper limits
DATE:    11/01/07 04:51:09 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 110106A (Mangano  et al., GCN 11520)
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 2011-01-06 15:26:22 UT (~65 sec after
the burst). We did not find any new point source within the
enhanced XRT error circle (Osborne et al., GCNC 11526) in all
the three bands.

Three sigma upper limits of the OT are listed below. We used
GSC2.3 catalog for flux calibration.


T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
------------------------------------------------------
0.00424    15:31:23     540.0   >20.0  >19.7  >18.8
0.09936    17:48:21    5040.0   >20.8  >20.4  >19.5
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]