{
  "bibcode": "2015GCN.17638....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\n\r\nWe began to observe GRB 150323B (Cumming., GCN 17619;  Kienlin., GCN 17623) \r\nwith Xinglong  0.8-m TNT telescope at 2015-03-23, 18:19:24(UT),\r\nabout 8.85 hour after the Swift trigger time. \r\n\r\n \r\nNo any new source was detected in our 10*300sec coadded image \r\nwithin the errorbox of BAT (Cumming.,  GCN 17619),\r\nand the errorbox of two uncatalogured X-ray sources (Avanzo et al., 17632)\r\ndown to the 3 sigma limit of 21.8 mag in R-band, calibrated by USNO B1.0 R2 mag,\r\nat the mean time of 9.28 hours after the burst. \r\n\r\n\r\nWe noted that there was a source in USNO B1.0 catalog \r\n( 17:21:50.446  +38:17:00.13  R2=20.5 mag ),\r\nwhich was located in the errorbox of the Source 2 (Avanzo et al., 17632),  \r\nbut the variation of its brightness was not decided.\r\n\r\n\r\nThe message may be cited.",
  "circularId": 17638,
  "createdOn": 1427267011000,
  "email": "xlp@bao.ac.cn",
  "subject": "GRB 150323B :  Xinglong TNT upper limit",
  "submitter": "L.P. Xin at NAOC  <xlp@bao.ac.cn>",
  "eventId": "GRB 150323B"
}