TITLE: GCN CIRCULAR NUMBER: 7824 SUBJECT: GRB 080603A: Xinglong R band observation DATE: 08/06/05 16:23:07 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 GRB080603A (Paizis et al., GCN 7790), with Xinglong 2.16m telescope + BFOSC on Jun 4, 1.321 Days after the burst. We marginally detected the OT (Gomboc et al., GCN 7788; Chornock et al., GCN 7789; Kuin et al., GCN 7804 Kann et al. GCN 7822) at 3 sigma level. With the same calibration star as used in GCN 7822 (Kann et al.) USNOB1.0 1527-0313986 at RA = 18:37:55.186, Dec. +62:45:32.28 R1 = 16.74, we estimated the OT brightness was R ~ 21.3 +/- 0.3. We also detected the faint star at east side of OT noted by Kann et al. This message may be cited. For more information about Xinglong GRBs Follow-up observations, please visit the website: http://www.xinglong-naoc.org/grb/