{
  "bibcode": "2006GCN..5547....1M",
  "body": "H. Mito, T. Soyano, (Tokyo Univ.) and Y. Urata (Saitama Univ.)\non behalf of EAFON report:\n\n\"We have observed the position of X-ray afterglow using Kiso 1.05m\nSchmited telescope.  The observation was started at 10:20 UT September\n4, 2006. The combined image from 20 frames taken with 300 sec exposure\nshows no optical afterglow associated with the X-ray afterglow\nposition brighter than 22.4 (R) mag.\n\n  -------------------------------------------\n  Start time  Exposure            Limit(SN=3)\n  10:20       300 sec x 20 frame  > 22.4\n  -------------------------------------------\n\nThis message may be cited.\"",
  "circularId": 5547,
  "createdOn": 1157716390000,
  "email": "urata@crystal.heal.phy.saitama-u.ac.jp",
  "subject": "GRB 060904A : Optical limit",
  "submitter": "Yuji Urata at Saitama U  <urata@crystal.heal.phy.saitama-u.ac.jp>",
  "eventId": "GRB 060904A"
}