{
  "bibcode": "1999GCN...224....1K",
  "body": "R. M. Kippen (University of Alabama in Huntsville) reports on behalf\nof the BATSE GRB team:\n\nGRB 990123 was detected by BATSE on 1998 January 23.407594 as trigger\nnumber 7343.  The event was strong and consisted of a multi-peaked\ntemporal structure lasting >100 s, with significant spectral\nevolution.  The T50 and T90 durations are 29.82 (-/+ 0.10) s and 63.30\n(-/+ 0.26) s, respectively.  The burst's peak flux (50-300 keV;\nintegrated over 1.024 s) and fluence (>20 keV) are 16.42 (-/+ 0.12)\nphotons cmE-2 sE-1 and 5.09 (-/+ 0.02) x 10E-4 erg cmE-2,\nrespectively---ranking it in the top 2% (0.3%) of the BATSE burst flux\n(fluence) distribution.  The average spectral hardness of the burst,\nas estimated by the ratio of 100-300 keV counts to those in the 50-100\nkeV range, is H32 = 1.51 (-/+ 0.004), which is average among BATSE\nbursts.  The BATSE burst location is consistent with those measured by\nBeppoSAX (GCN 199,202,203) and with the proposed optical/radio\ntransient counterpart (GCN 201; 204-221).  A location sky-map and\nlightcurve for this event (and other notable bursts) are available at\nthe BATSE Rapid Burst Response world-wide-web site:\n\n          http://www.batse.msfc.nasa.gov/~kippen/batserbr/\n\n-eof-",
  "circularId": 224,
  "createdOn": 917302735000,
  "email": "marc.kippen@msfc.nasa.gov",
  "subject": "GRB 990123: BATSE Observations",
  "submitter": "R. Marc Kippen at BATSE/UAH/MSFC  <marc.kippen@msfc.nasa.gov>",
  "eventId": "GRB 990123"
}