{
  "bibcode": "2011GCN.11731....1X",
  "body": "L.P. Xin, Y.L. Qiu, J.Y. Wei, J. Wang, J.S. Deng, \nC. Wu, X. H. Han, M, Zhai on behalf of EAFON report:\n\nWe observed GRB 110213A (V. D'Elia et al. GCN11705 ) \nwith Xinglong TNT telescope for two epochs from Feb 13th to Feb 14th.\nA series of R-band  images were obtained with an exposure \ntime of 300 sec for each frame. \n\nThe optical afterglow counterpart  (e.g.  V. D'Elia et al. GCN11705; \nCenko GCN 11706; Wren et al. GCN 11730 ) \ncould be clearly detected in each frame otained at Feb 13th. \nIt was also detected at Feb 14th after combining 12 frames.\n\nThe brightness of the afterglow was estimated to be about \n20.2 +/- 0.2 mag relatively to USNO B1.0 R2 mag \nat the mean time of 1.24 days after the burst. \n\nFurther observations  are encouraged.\n\nThis message may be cited.",
  "circularId": 11731,
  "createdOn": 1297739299000,
  "email": "xlp@bao.ac.cn",
  "subject": "GRB 110213A:  TNT optical observations",
  "submitter": "L.P. Xin at NAOC  <xlp@bao.ac.cn>",
  "eventId": "GRB 110213A"
}