{
  "bibcode": "2012GCN.13500....1X",
  "body": "L. P. Xin, J. Y. Wei, Y. L. Qiu, J. Wang,  J. S. Deng, \nC. Wu,  X. H. Han on behalf of EAFON report:\n\nWe began to observe GRB 120722A  (Melandri et al. GCN 13499)\nwith Xinglong TNT telescope in R-band at 12:56:53 (UT),  \n3.5 min  after the burst.  An optical counterpart was detected \n in our combined image  within the errorbox of X-ray afterglow location\n (Melandri et al. GCN 13499)   with a brightness of about 20.8 mag in R band,  \ncalibrated against the USNO B1.0 R2mag.\n\nThe coordinates and magnitude of the reference star we used \nare 15:21:54.116  +13:15:50.70, J2000 and R2=16.91 mag in USNO B1.0.\n\nThis message may be cited.\n\nFurther observations are encouraged.\n\nFor more information about Xinglong GRBs Follow-up\nobservations, please visit the website:\nhttp://www.xinglong-naoc.org:8080/grb/index.html\n\nWe thank Chunlan Lu for performing these observations.",
  "circularId": 13500,
  "createdOn": 1342966725000,
  "email": "xlp@bao.ac.cn",
  "subject": "GRB 120722A: Xinglong TNT optical afterglow candidate",
  "submitter": "L.P. Xin at NAOC  <xlp@bao.ac.cn>",
  "eventId": "GRB 120722A"
}