{
  "bibcode": "1999GCN...400....1G",
  "body": "T. Giblin, G. Richardson, and R. M. Kippen (University of Alabama\nin Huntsville) report on behalf of the BATSE GRB Team:\n\n\nGRB990806 was detected by BATSE on 1999 August 6.60285 UT as trigger \n7701. The time profile of the burst exhibits a FRED-like structure \n(fast rise and slower decay) with some variability on shorter time \nscales. The T50 and T90 durations are 4.93 (+/- 0.26) and 17.41 \n(+/- 3.84) seconds, respectively. The peak flux of the burst, \nintegrated over 1.024 s in the 50-300 keV range, is 1.60 (+/- 0.05) \nphotons cmE-2 sE-1, placing it in the top 28% of the BATSE peak flux \ndistribution. The fluence (>20 keV) of the burst is 3.29 (+/- 0.53) \nx 10E-6 erg cmE-2, ranking it in the top 43% of the BATSE fluence \ndistribution. The average spectral hardness of the burst (H32), as \ndetermined by the ratio of total counts in the 100-300 keV to the \n50-100 keV range, is 0.811 (+/- 0.034), average for BATSE GRBs of \nthis duration. The BATSE location error circle (90% conf.) is \nslightly offset (~2 degrees) from the BeppoSAX WFC location (GCN 393). \nThe lightcurve and skymap location that includes the WFC and BATSE \nlocations for this event (and other notable GRBs) are available at \nthe BATSE Rapid Burst Response world-wide-web site:\n\n          http://www.batse.msfc.nasa.gov/~kippen/batserbr/",
  "circularId": 400,
  "createdOn": 934302794000,
  "email": "giblin@bowie.msfc.nasa.gov",
  "subject": "GRB990806:  BATSE Observations",
  "submitter": "Timothy Giblin at MSFC  <giblin@bowie.msfc.nasa.gov>",
  "eventId": "GRB 990806"
}