GCN Circular 12233

D. Kuroda (OAO, NAOJ),  H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ),
K. Yanagisawa (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 110801A (Pasquale et al., GCNC 12228)
with the optical three color (g', Rc and Ic) CCD camera attached
to the Murikabushi 1m telescope of Ishigakijima Astronomical
Observatory.

The observation started on 2011-08-01 19:53:51 UT (~4 min after the burst).
We detected the previously reported afterglow (Pasquale et al.,
GCNC 12228; Zheng and Guver, GCNC 12229; Guelbenzu et al., GCNC 12230)
in all the three bands.

Photometric results of the OT are listed below. We used GSC2.3 catalog
for flux calibration.

#T0+[day]  MID-UT    T-EXP[sec]   g'  g'_err   Rc  Rc_err   Ic  Ic_err
----------------------------------------------------------------------
0.00323    19:54:21     60.0    16.16  0.07  15.14  0.04  14.44  0.04
0.00404    19:55:31     60.0    15.35  0.06  14.29  0.04  13.57  0.04
0.00485    19:56:41     60.0    15.38  0.06  14.28  0.04  13.56  0.04
0.00731    20:00:14     60.0    15.54  0.06  14.51  0.04  13.79  0.04
0.00976    20:03:45     60.0    15.71  0.07  14.67  0.04  13.98  0.04
0.01222    20:07:18     60.0    15.77  0.07  14.79  0.04  14.12  0.04
0.01466    20:10:48     60.0    15.89  0.07  14.91  0.04  14.24  0.04
----------------------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]