TITLE: GCN CIRCULAR NUMBER: 12240 SUBJECT: GRB110801A: MITSuME Ishigakijima Optical Observation at 1 day after the burst DATE: 11/08/03 04:58:24 GMT FROM: Daisuke Kuroda at OAO/NAOJ 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 (De 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 2011-08-02 17:38:02 UT (~21.8 h after the burst). We detected the previously reported afterglow (Pasquale et al., GCNC 12228; Zheng and Guver, GCNC 12229; Guelbenzu et al., GCNC 12230; Kuroda et al., GCNC 12233) 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 ---------------------------------------------------------------------- 0.95038 18:38:15 5760.0 21.5 0.3 20.3 0.2 19.1 0.2 ---------------------------------------------------------------------- T0+ : Elapsed time after the burst [day] T-EXP: Total Exposure time [sec]