TITLE: GCN CIRCULAR NUMBER: 8097 SUBJECT: GRB080810: MITSuME optical observation DATE: 08/08/12 09:27:10 GMT FROM: Michitoshi Yoshida at Okayama Astrophysical Obs 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 (Ikejiri et al. GCN 8081; Rykoff GCN 8084) of GRB 080810 (Page et al. GCN 8080) with the optical three color (g', Rc and Ic) imager attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory. Photometric results are listed below. We used USNO-B1.0 stars for flux calibration. Mid-UT exp-T g' Rc Ic -------------------------------------------------------------- 2008-08 10.60244 300 sec 17.16+/-0.06 16.70+/-0.04 15.69+/-0.05 --------------------------------------------------------------