[vsnet-grb-info 5755] GRB080310: Optical observation by MITSuME telescope

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7410
SUBJECT: GRB080310: Optical observation by MITSuME telescope
DATE:    08/03/11 15:55:27 GMT
FROM:    Michitoshi Yoshida at Okayama Astrophysical Obs  <yoshida at oao.nao.ac.jp>

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

We detected the optical afterglow of GRB 080310 (Cummings, et al.,
GCN 7382) in the error circle of the XRT position (Osborne et al.
GCN 7394) with the 50cm MITSuME Telescope at Okayama Astrophysical
Observatory on March 10 UT. Photometric calibration was done using
USNO-B1.0 catalog. The light curve shows a plateau at around 19:00 -
20:00 UT (about 11 hours after the trigger).
The photometric results are summarized below.

Observation date: 2008-03-10 UT

mid-UT     exp-T         g'            Rc            Ic
------------------------------------------------------------
15:09:46   60min     20.0+-0.2     19.7+-0.3     19.1+-0.2
16:24:47   60min     20.4+-0.2     20.2+-0.2     19.5+-0.2
17:39:46   60min     20.6+-0.1     20.4+-0.2     19.8+-0.2
18:54:44   60min     20.6+-0.2     20.5+-0.1     20.2+-0.3
19:57:05   42min     20.6+-0.2     20.3+-0.1     20.0+-0.2
------------------------------------------------------------