TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4105 SUBJECT: GRB 051016B : Optical follow-up at Lulin DATE: 05/10/17 03:12:42 GMT FROM: Kuiyun Huang at IANCU GRB 051016B : Optical follow-up at Lulin Y.T. Chen, Y.L. Wu, K-Y. Huang, W-H. Ip(NCU), Y. Urata (RIKEN) on behalf of EAFON report: " We have observed entire error region of GRB 051016B (Parsons et al. GCN 4103) with 1-m telescope at Lulin Observatory, Taiwan. Compare with DSS-2 images, we find a source in the Swift/XRT error region. The position is RA=08:48:27.81 DEC=+13:39:20.0. The source do not show significant variability during our observational period (1.5-2 hours after the burst). These 3-sigma limiting magnitudes derived from the USNO-B1.0 catalog are R=21.5. This message may be cited."