TITLE: GCN CIRCULAR NUMBER: 6904 SUBJECT: GRB 071011: Xinglong TNT Optical afterglow observations DATE: 07/10/12 19:51:41 GMT FROM: L.P. Xin at NAOC L.P. Xin, M.Zhai, Y.L. Qiu, J.Y. Wei, J.Y. Hu, J.S. Deng, Y. Urata, and W.K. Zheng on behalf of EAFON report: We have observed GRB 071011 beginning at 12:46:05.3 UT, 353s after the burst with TNT 80cm and EST 1m telescopes at xinglong Observatory, A series of Whiete, R and V band images were obtained, preliminary analysis shows the optical afterglow reported by S. B. Cenko (GCN 6895), faded continuly. Derived from USNO-A2.0 R magnitude, We find the early time White band magnitude: --------------------------------------------------- (sec after the burst ) magnitude merr 363.053 17.88143 0.08 407.981 18.02971 0.09 498.701 18.28329 0.10 657.677 18.52271 0.10 834.797 19.55457 0.08 Further analysis is under going. This message may be cited.