{
  "bibcode": "2008GCN..8720....1B",
  "body": "Elisabetta Bissaldi (MPE)\nreports on behalf of the Fermi GBM Team: \n\n\n\"At 10:03:57.15 UT on 23 December 2008, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 081223 (trigger 251719438 / 081223419).\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 116.7, Dec = 33.5 (J2000 degrees,\nequivalent to 07h 47m, 33d 30'), with an uncertainty\nof 6.2 degrees (radius, 1-sigma containment,\nstatistical only; there is additionally a systematic\nerror which is currently estimated to be 2 to 3 degrees).\n\nThe angle from the Fermi LAT boresight is 28 degrees.\n\nThis short burst was also independently detected by INTEGRAL SPI-ACS.\n\nThe GBM light curve consists of a single spike\nwith a duration (T90) of about 890 ms (8-1000 keV).\nThe time-averaged spectrum from T0-0.078 s to T0+0.434 s is\nadequately fit by a power law function with an exponential\nhigh energy cutoff.  The power law index is -0.63 +/- 0.10 and\nthe cutoff energy, parameterized as Epeak, is 280 +/- 30 keV\n(chi squared 334 for 318 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is \n(1.20 +/- 0.10)E-06 erg/cm^2. The 64-ms peak photon flux\nmeasured starting from T0+0.114 s in the \n8-1000 keV band is 22 +/- 3 ph/s/cm^2.\n\n\nThe spectral analysis results presented above are preliminary; \nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 8720,
  "createdOn": 1230122000000,
  "email": "ebs@mpe.mpg.de",
  "subject": "GRB 081223: Fermi GBM detection",
  "submitter": "Elisabetta Bissaldi at MPE  <ebs@mpe.mpg.de>",
  "eventId": "GRB 081223"
}