{
  "bibcode": "2015GCN.18515....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  observed  GRB 151027A (Maselli et al., GCN 18478)  \r\nwith Xinglong  0.8-m TNT telescope at 2015-10-27 and 2015-10-28.\r\n \r\nThe optical afterglow (Maselli et al., GCN 18478;  Zheng & Filippenko \r\nGCN 18479; Elenin et al., GCN 18480;  Perley & Cenko GCN 18481; Xu et al, 18485; \r\nZhang et al., GCN 18513) was clearly detected in our multi-band images.\r\nThe brightness of the optical afterglow is decayed for about 2.5 mag in R-band \r\nduring our observations as shown in follows:\r\n==============================\r\nDate             Time(UT)       filter  mag   merr            \r\n2015-10-27  11:21:59          R       16.2    0.1\r\n2015-10-28  11:04:00          R       18.7    0.1\r\n==============================\r\nCalibrated by the USNO B1.0 R2 mag\r\n\r\nMore observations are encouraged. \r\n\r\nThe message may be cited.",
  "circularId": 18515,
  "createdOn": 1446043077000,
  "email": "xlp@bao.ac.cn",
  "subject": "GRB 151027A :  Xinglong TNT optical observation",
  "submitter": "L.P. Xin at NAOC  <xlp@bao.ac.cn>",
  "eventId": "GRB 151027A"
}