TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5634 SUBJECT: GRB 060927 : Kiso optical observation DATE: 06/09/27 16:03:53 GMT FROM: Yuji Urata at Saitama U Y. Sarugaku, N. Miura (Tokyo Univ), Z.W. Zheng (NAOC), K.Y. Huang (NCU) and Y. Urata (Saitama U/ NCU) on behalf of EAFON report: "We have observed the XRT error region of GRB 060927 using Kiso 1.05m Schmit telescope. The observation was started at 14:27 (about 20 min after the burst). The optical afterglow is marginally detected in our R band images taken with 90 sec exposure. The brightness in R band derived by USNO-B1.0 catalog is 19.5 +/- 0.3. Further observations and analysis are progress." This message can be cited.