{
  "bibcode": "1999GCN...210....1O",
  "body": "Eran Ofek and Elia M. Leibowitz, Wise Observatory, Tel Aviv University\nreport:\n\n>From 4 CCD frames of the object taken at the WO between Jan\n24.0617-24.1162 we have determined an average R magnitude of\n19.87+-0.2, with calibration based on 4 USNO A2.0 stars.  The decay\nparameter in the R band over that time interval is -1.9+-0.1.  On Jan\n24.0625, the color index of the object was B-R=-0.48+-0.25.\n\n\nThis report may be cited.",
  "circularId": 210,
  "createdOn": 917192149000,
  "email": "pmv@astro.uva.nl",
  "subject": "GRB990123 optical observations",
  "submitter": "Paul Vreeswijk at U of Amsterdam  <pmv@astro.uva.nl>",
  "eventId": "GRB 990123"
}