{
  "bibcode": "2007GCN..6260....1X",
  "body": "L.P. Xin, M.Zhai, Y.L. Qiu, J.Y. Wei, J.Y. Hu, J.S. Deng,\nand W.K. Zheng on behalf of EAFON report:\n\nWe refined xinglong TNT data again, the candidate we\nrecommended before(GCN6253) may not be a real object\nbut a disturbance source due to CCD problem, we apologize\nfor this mistake and miss guidance.\n\nWe note there are several dark pixels at the CCD location\nwe mention before, and there is always a point-like source\nat the same dark pixels of CCD positon in our white band \nimage even thought the field has changed. To confirm this\nwe performed third epoach observation with multi-band about\n41 hours after the burst. We did not detect the candidate\nin all White, R, V bands, but in white bandat the dark\npixels postion there was still a faint point-like source.\nSome subframs are avaliable at:\nhttp://www.xinglong-naoc.org:8080/GRB070406/20h_W.fit\nhttp://www.xinglong-naoc.org:8080/GRB070406/35h_W.fit\nhttp://www.xinglong-naoc.org:8080/GRB070406/41h_W.fit\nhttp://www.xinglong-naoc.org:8080/GRB070406/41h_R.fit\nthe source detected by Bloom et al.(GCN6259) may just be a\ncoincidence with the coordinat we mentioned before.\n\nThis message can be cited.",
  "circularId": 6260,
  "createdOn": 1176022040000,
  "email": "zwk@bao.ac.cn",
  "subject": "GRB 070406: Correction to the optical candidate in GCN6253",
  "submitter": "W.K. Zheng at NAOC  <zwk@bao.ac.cn>",
  "eventId": "GRB 070406"
}