{
  "bibcode": "2013GCN.15070....1Y",
  "body": "Subject: GRB 130804A: Fermi GBM observation\n\nHoi-Fung Yu (MPE), Adam Goldstein (ORAU/NASA MSFC) and Veronique Pelassa (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 00:33:15.53 UT on 04 August 2013, the Fermi Gamma-Ray Burst\nMonitor triggered and located GRB 130804A (trigger 397269198 / 130804023).\n\nHigh peak flux from the GRB caused GBM to issue a repoint request\nthat reoriented the satellite to place the GRB near the LAT boresight\nfor 2.5 hours, subject to Earth limb contraints.\n\nThe on-ground calculated location, using the GBM trigger data, is\nRA = 280.0, DEC = -76.2 (J2000 degrees, equivalent to 18h 40m,\n-76d 09'), with an uncertainty of 2.3 degrees (radius, 1-sigma\ncontainment, statistical only; there is additionally a systematic\nerror which is currently estimated to be 2 to 3 degrees). The\nangle from the Fermi LAT boresight is 21 degrees.\n\nThe GBM light curve consists of two main pulses with sub-structures,\nwith a duration (T90) of about 0.96 s (50-300 keV).\nThe time-averaged spectrum from T0-0.064 s to T0+1.024 s is\nadequately fit by a Band function with Epeak = 545 +/- 110 keV,\nalpha = -0.77 +/- 0.09, and beta = -2.22 +/- 0.31.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.89 +/- 0.10)E-6 erg/cm^2. The 64 ms peak photon flux measured\nstarting from T0-0.064 s in the 10-1000 keV band\nis 42.0 +/- 1.7 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 15070,
  "createdOn": 1375748467000,
  "email": "sptfung@mpe.mpg.de",
  "subject": "GRB 130804A; Fermi GBM observation",
  "submitter": "Hoi-Fung Yu at MPE  <sptfung@mpe.mpg.de>",
  "eventId": "GRB 130804A"
}