[AAVSO-HEN] GRB 080710: Optical observation with MITSuME Okayama

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
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TITLE:   GCN CIRCULAR
NUMBER:  7973
SUBJECT: GRB 080710: Optical observation with MITSuME Okayama
DATE:    08/07/11 23:35:57 GMT
FROM:    Michitoshi Yoshida at Okayama Astrophysical Obs  <yoshida at oao.nao.ac.jp>

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

We observed the optical afterglow (Li et al. GCN 7959; D'Avanzo
et al. GCN 7960; Schady GCN 7961) of GRB 080710 (Sbarufatti
et al. GCN 7957) with the optical three color (g', Rc and Ic)
imager attached to the MITSuME 50cm telescope of Okayama
Astrophysical Observatory. We started the observation at
2008-07-10 15:37:23 UT. Photometric results are listed below.
We used four USNO-B1.0 stars around the afterglow. The Rc band
magnitude is consistent with the power-law decay with alpha = 1.5
reported by Schulze et al. (GCN 7972).

mid-UT of the observation:
   2008-07-10 16:27:00 (0.384595 days after trigger)

T-T0(days) exp-T        g'              Rc              Ic
----------------------------------------------------------------
0.384595   86min  18.79 +/- 0.08  18.96 +/- 0.06  18.57 +/- 0.06
----------------------------------------------------------------