[vsnet-grb-info 9737] GRB10901A: Optical observations at IAO

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11205
SUBJECT: GRB10901A: Optical observations at IAO
DATE:    10/09/04 13:33:16 GMT
FROM:    Daisuke Kuroda at OAO/NAOJ  <dikuroda at oao.nao.ac.jp>

D. Kuroda (OAO, NAOJ),  H. Hanayama, T. Miyaji, J. Watanabe(IAO, NAOJ),
K. Yanagisawa (OAO, 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 100901A (Immler et al., GCN 11159)
with the optical three color (g', Rc and Ic) CCD camera attached
to the Murikabushi 1m telescope of Ishigakijima Astronomical
Observatory.
Our observations started on 2010-09-02 13:22:45 UT (~1.0 day after the
burst) and 2010-09-03 15:24:41 UT (~2.1 day after the burs). We detected
the previously reported afterglow (Immler et al., GCN 11159;
Guidorzi et al., GCN 11160; Kuroda et al., GCN 11172; Kuroda et al.,
GCN 11189; Ukawatta et al., GCN 11198) in all the three bands.

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

#T0+[day]  MID-UT    T-EXP[sec]   g'  g'_err   Rc  Rc_err   Ic  Ic_err
----------------------------------------------------------------------
1.04604    14:40:28  1560.0     19.49  0.04  18.86  0.04  18.25  0.05
1.08548    15:37:16  1560.0     19.59  0.04  18.93  0.04  18.41  0.06
1.14442    17:02:08  1500.0     19.64  0.05  19.11  0.04  18.50  0.07
2.13035    16:41:52  4020.0     20.71  0.08  19.96  0.06  20.04  0.17
----------------------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]