TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4106 SUBJECT: GRB 051016B,optical observation DATE: 05/10/17 13:10:56 GMT FROM: Shouta Maeno at U.of Miyazaki S.Maeno,E.Sonoda,Y.Tokunaga,M.Yamauchi (University of Miyazaki) "We have observed the field covering the error circle of GRB 051016B (GCN4103) with the unfiltered CCD camera on the 30-cm telescopeat University of Miyazaki. The observation was started 19:16:07 UT on Oct.16. After co-adding a set of 25 images (19:16:07 - 19:59:25 UT) of 30 sec exposures, we have compared with the USNO A2.0 catalog. Preliminary analysis shows there is no new source brighter than 17.8 mag."