TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2106 SUBJECT: GRB030329: Kiso B and R band observations DATE: 03/04/07 01:38:35 GMT FROM: Yuji Urata at RIKEN Y. Urata(1), T. Miyata(1), S. Nishiura(1), T. Tamagawa(1), T. Sekiguchi(2), S. Miyasaka(3), C. Yoshizumi(4) 1; Kiso GRB team 2; National Astromical Observatory of Japan 3; Tokyo Metropolitan Government 4; Tokushima children's science museum report; "We have observed the optical afterglow (Peterson and Price GCN1985) of GRB030329 on the nights of 2003 March 29 and April 1 using the Kiso observatory (the University of Tokyo) 105 cm Schmidt telescope with B and R band filters. Our observations started at March 29 13:21:26 (1.8 hour after the burst). We have measured the B and R band magnitude using field photometry (Henden GCN2082). The results are listed below. The observations and more accurate photometry are in progress. Date start time exp band mag err 2003-03-29 14:23:50 60.0 R 13.324 0.010 2003-03-29 15:23:59 60.0 R 12.719 0.010 2003-03-29 16:21:56 120.0 R 13.754 0.010 2003-03-29 17:22:20 60.0 R 13.744 0.010 2003-03-29 17:42:16 60.0 R 13.644 0.010 2003-04-01 10:56:40 300.0 R 17.281 0.077 2003-04-01 10:41:15 300.0 B 17.943 0.063 We thank many high school students who participated in the education program at Kiso observatory in the night to collaborate with us." This message may be cited.