{
  "bibcode": "2010GCN.10790....1M",
  "body": "S. McBreen (UCD/MPE)\nreports on behalf of the Fermi GBM Team:\n\n\"At 03:45:52.29 UT on 22 May 2010, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 100522A (trigger 296192754 / 100522157)\nwhich was also detected by the Swift-BAT (Troja et al. 2010, GCN 10784).\nThe GBM on-ground location is consistent with the Swift position.\nThe angle from the Fermi LAT boresight is 81 degrees.\n\nThe GBM light curve consists of two of pulses with\nsubstructure from T0 to T0+5 s followed by two softer pulses\nlasting from T0+25 s to about T0+40 sec.  The burst\nhas a duration (T90) of about 35.0 +/-1.5 s (50-300 keV).\nThe time-averaged spectrum from T0-0.003 s to T0+40.385 s is\nadequately fit by a simple power law function\nwith index -1.81 (+/-0.03)(CSTAT 544 for 481 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is\n(5.2 +/- 0.2)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+0.25 s in the 8-1000 keV band\nis 11.0 +/- 0.3 ph/s/cm^2.\n\nA power law function with an exponential high energy cutoff\nfits the spectrum equally well (CSTAT 538 for 480 d.o.f).\nThe power law index is -1.62 (+0.10/-0.09) and\nthe cutoff energy, parameterized as Epeak, is 138 (+82/-32) keV.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 10790,
  "createdOn": 1274548374000,
  "email": "smcbreen@mpe.mpg.de",
  "subject": "GRB 100522A: Fermi GBM observation",
  "submitter": "Sheila McBreen at MPE  <smcbreen@mpe.mpg.de>",
  "eventId": "GRB 100522A"
}