TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2785 SUBJECT: GRB 041006 : optical follow-up observation at Lulin Observatory DATE: 04/10/08 15:09:42 GMT FROM: Kuiyun Huang at IANCU GRB 041006 : optical follow-up observation at Lulin Observatory D. Kinoshita, Z.Y. Lin K.Y. Huang, Y. Urata, K. Onda, W.H. Ip, T. Tamagawa on behalf of Lulin GRB collaboration report: " We have observed the optical afterglow reported by Costa et al. (GCN 2765) at 7.65 hr after the burst using Lulin 1-m telescope. The afterglow's magnitude compared with USNOB-1 catalogue are: Filter Exopsure UT Mag. B 300s 19:57:08 20.1 R 300s 20:02:54 19.9 This message maybe cited. " [GCN OPS (08oct04): Due to a disk-full error, this Circular was issued with the wrong serial number. It has been changed from 2807 to 2785.]