{
  "bibcode": "1999GCN...365....1V",
  "body": "The U.S. Naval Observatory GRB team (F.J. Vrba, A.A. Henden, C. B.\nLuginbuhl, B. Canzian, S.E. Levine), D.H. Hartmann (Clemson Univ.) and, \nM.C. Jennings (IGPP, UCR visitor) reports:\n\nWe have obtained calibrated photometric observations, under clear sky\nconditions, of the 7-arcmin radius error circle for GRB 990704,\nreported by Gandolfi et al. in GCN 361. R-band (Cousins) observations \nwere obtained at the U.S. Naval Observatory, Flagstaff Station\n1.0-m reflector using a CCD with an 11x11 arcmin field.  Four 12 minute\nobservations were mosaiced to cover a 15x15 arcmin field centered on\nthe GCN 361 coordinates.  The observations were obtained between\nUT 1999 July 05 04:02 and 04:57.  The frames reached a 3-sigma limiting \ndetection of Rc = 21.2.  No obvious new objects were detected in a \ncomparison with the Digital Sky Survey.\n\n\n[GCN OPS NOTE:  This message was received at 09:45 UT 05 Jul 99.]",
  "circularId": 365,
  "createdOn": 931181104000,
  "email": "fjv@nofs.navy.mil",
  "subject": "GRB990704, optical observations",
  "submitter": "Fredrick J. Vrba at USNO  <fjv@nofs.navy.mil>",
  "eventId": "GRB 990704"
}