TITLE: GCN CIRCULAR NUMBER: 11186 SUBJECT: GRB100901A: Errata of MITSuME Okayama about reference catalog DATE: 10/09/03 01:07:19 GMT FROM: Daisuke Kuroda at OAO/NAOJ D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration: The reference catalog reported in GCN 11172 is incorrect. We used SDSS calalog for flux calibration.