TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4262 SUBJECT: GRB 051111A : R-band temporal decay index based on Lulin DATE: 05/11/11 16:06:28 GMT FROM: Yuji Urata at RIKEN GRB 051111A : R-band temporal decay index based on Lulin observations F.Y. Huang, K.Y. Huang, W.H. Ip (NCU), Y. Urata(RIKEN), Y. Qiu (BAO), Y.Q. Lou (THCA) on behalf of EAFON report: "We have observed the optical afterglow of GRB 051111 (GCN # 4247, 4248) using the Lulin 1m telescope with BVRI band filters between 10:07 UT and 14:54 UT on Nov 11 2005. Combine with our previous preliminary result (GCN # 4258), the R-band light curve shows shallow decay. When we fit all our R-band data with single power-law the temporal index is determined as alpha~-0.6. Further analysis is in progress." This message may be cited.