GCN Circular 4230
GRB 051109A : Lulin BVRI Optical afterglow observation 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 GRB 051109A afterglow (Rykoff et al. GCN4211) using Lulin 1-m telescope from 9.59 to 13.34 hours after ther burst. The afterglow was detected in our B,V,R,I band images. The R band magnitude of afterglow at 10.97 UT is estimated as R=20.3 calibrated against USNO-B1.0 catalog. Further analysis is in progress. This message may be cited."