TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2494 SUBJECT: GRB031220 : Optical Observation of Lulin Observatory DATE: 03/12/20 14:52:04 GMT FROM: Kuiyun Huang at IANCU M.K.Yang (NCU), C.P.Chin (NCU) K.Y. Huang, Y. Urata, W.H. Ip, T. Tamagawa on behalf of Lulin GRB collaboration report: " We have observed the entire SXC error box of GRB031220(=H2976) in R-band at Lulin observatory(National Central University, Taiwan) beginning at 11:49 UT on Dec. 20. There are no candidate in these images comparison with DSS-II images down to 20.9 mag. Further analysis and observation are in progress." This message may be cited.