{
  "bibcode": "2009GCN..9424....1V",
  "body": "A. von Kienlin (MPE) report on behalf of the Fermi GBM Team: \n\n\"At 08:17:56.23 UT on 24 May 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090524 (trigger 264845878 / 090524346).\nThe on-ground calculated location, using the GBM trigger \ndata, is RA = 329.5, DEC = -67.4 (J2000 degrees, \nequivalent to 21h 58m, 67d 24'), with an uncertainty \nof 1.3  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 63 degrees.\n\nThis burst was also independently detected by INTEGRAL SPI-ACS.\n\nThe GBM light curve consists of two main pulses\nwith a duration (T90) of about 72 s (8-1000 keV). \nThe time-averaged spectrum from T0+0.003 s to T0+71.681 s is \nbest fit by a Band function with Epeak = 82.6 +/- 6.3 keV, \nalpha = -1.00 +/- 0.08, and beta = -2.30 +/- 0.09\n(chi squared 959 for 840 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is \n(1.85 +/- 0.15)E-05 erg/cm^2. The 1-sec peak photon flux measured \nstarting from T0+5.120 s in the 8-1000 keV band \nis 14.1 +/- 1.4 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary; \nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9424,
  "createdOn": 1243351247000,
  "email": "azk@mpe.mpg.de",
  "subject": "GRB 090524: Fermi GBM detection",
  "submitter": "Andreas von Kienlin at MPE  <azk@mpe.mpg.de>",
  "eventId": "GRB 090524"
}