{
  "bibcode": "2014GCN.16261....1X",
  "body": "L. P. Xin,   X. F. Wang,  J. Y. Wei,  Y. L. Qiu, J. S. Deng,  \r\nJ. Wang, X. H. Han and C. Wu on behalf of EAFON report:\r\n\r\nWe began to observe GRB 140512A (Pagani et al., GCN 16429)  with Xinglong \r\n0.8-m TNT telescope at 19:33:54  (UT) , 126 sec after the burst.\r\n\r\nThe optical counterpart (Pagani et al., GCN 16429) was clearly detected\r\n in our white and R band images.  A preliminary analysis shows that \r\nthe brightness of the OT was fading from 13.0 mag to 17.0 mag, \r\ncalibrated by nearby USNO B1.0 R2mag, during our observation epoch,  \r\nwith an index of  1.54  after fitting by a single power law.\r\n\r\nThe message may be cited.",
  "circularId": 16261,
  "createdOn": 1399998320000,
  "email": "xlp@bao.ac.cn",
  "subject": "GRB 140512A:  Xinglong TNT optical observation",
  "submitter": "L.P. Xin at NAOC  <xlp@bao.ac.cn>",
  "eventId": "GRB 140512A"
}