TITLE: GCN CIRCULAR NUMBER: 10279 SUBJECT: GRB 091208B: Xinglong TNT optical observation DATE: 09/12/13 08:53:10 GMT FROM: L.P. Xin at NAOC L.P. Xin, S. B, Qian, Y.L. Qiu, J. Wang, J.Y. Wei, W. K. Zheng, J. S. Deng, and J. Y. Hu on behalf of EAFON report: We observed the optical afterglow of GRB 091208B (Pagani et al. GCN 10256) with Xinglong TNT telescope from Nov. 8th, 10:12:31.6(UT), 23 min after the burst. The optical counterpart was clearly detected in our images. The brightness was estimated to be about R~18.5 relative to the USNO-B1.0 R2 mag, at the meam time of 30 min after the burst. This message may be cited. for more information about Xinglong GRBs Follow-up observations, please visit the web-site http://www.xinglong-naoc.org/grb/