{
  "bibcode": "2007GCN..7015....1X",
  "body": "L.P. Xin, M. Zhai, Y.L. Qiu, J.Y. Wei, J.Y. Hu, J.S. Deng,\nJ. Wang and W.K. Zheng on behalf of EAFON report:\n\nWe have imaged the field of GRB071028 (J. L. Racusin, GCN7012 ; J. Cummings, \nGCN7013; J. Racusin, GCN7014) with EST 1m telescope at Xinglong Observatory. \nThe observations were started from  17:57:16 UT, 16.25min after the burst. \nA series of V-band images were obtained . No new source was found in our \ncombined images within the error region of the XRT (J. L. Racusin, GCN7012)\nbut We found the location reported by J. Racusin(GCN7014) was consisting with \na very bright star in USNO-B1.0.\n\nThe 3 sigma limit of our V-band combined images derived from USNO-B1.0 R2mag \nwere :\n\n------------------------------------\nBand     Mid time     Exp time  Limit Mag\nV        30min        19*60       19.8\nV        1.19hours      9*300s     19.98\nV        2.98hours     14*600s     20.09            \n\nThis message may be cited",
  "circularId": 7015,
  "createdOn": 1193628733000,
  "email": "xlp@bao.ac.cn",
  "subject": "GRB071028: Xinglong EST V-band upper limit",
  "submitter": "L.P. Xin at NAOC  <xlp@bao.ac.cn>",
  "eventId": "GRB 071028"
}