{
  "bibcode": "2002GCN..1493....1K",
  "body": "T. Kawabata (BAO), T. Morishita (OPU), T. Hatayama (BAO visitor),\nY. Urata (Titech / RIKEN), and H. Yamaoka (Kyushu U) report:\n\n  \"A full analysis of Bisei Astronomical Observatory (BAO) images (GCN\n1489) of GRB 020812 was performed.  The entire error box was imaged\nfive times with 12 no-filter pointing observations (60 seconds\nexposure each) by 1.01-m BAO telescope.  \n \n set     Time(UT)\n  1  Aug 12 14:00-14:28\n  2  Aug 12 14:31-14:55\n  3  Aug 13 15:19-15:40\n  4  Aug 13 15:43-16:02\n  5  Aug 13 16:07-16:28\n \n  The limiting magnitude for each images is mag 19.1 (3 sigma,\ncompared with USNO-A2.0 red magnitudes), although some images are poor\nbecause of thin clouds.  \n\n  Comparison with DSS II red images, no new object was detected down\nto the limiting magnitude.  Also, the comparison between our \nobservations, no notable variable object was detected.\"\n\nThis message may be cited.",
  "circularId": 1493,
  "createdOn": 1029396639000,
  "email": "urata@crab.riken.go.jp",
  "subject": "GRB 020812: optical observation at Bisei",
  "submitter": "Yuji Urata at RIKEN  <urata@crab.riken.go.jp>",
  "eventId": "GRB 020812"
}