TITLE: GCN CIRCULAR NUMBER: 7825 SUBJECT: GRB 080604: Xinglong R band observation DATE: 08/06/05 16:25:28 GMT FROM: W.K. Zheng at NAOC X.M. Meng, Y.N. Zhu, L.P. Xin, Q.C. Feng, M. Zhai, Y.L. Qiu, J.Y. Wei, J.Y. Hu, J.S. Deng, J. Wang, Y. Urata and W.K. Zheng on behalf of EAFON report: We observed GRB080604 (La Parola et al., GCN 7800) with Xinglong 2.16m telescope + BFOSC on Jun 4, 8.024 hours after the burst. We marginally detected the OT (La Parola et al., GCN 7800; Rol et al., GCN 7801; De Pasquale et al., GCN 7820) at 3 sigma level. The estimated brightness was R ~ 21.6 +/- 0.3 calibrated to USNO-A2.0 stars. This message may be cited. For more information about Xinglong GRBs Follow-up observations, please visit the website: http://www.xinglong-naoc.org/grb/