{
  "bibcode": "2017GCN.21005....1B",
  "body": "E. Burns (UAH), E. Bissaldi (Politecnico & INFN Bari),\nS. Poolakkil (UAH), and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 02:42:00.49 UT on 09 April 2017 , the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 170409A (trigger 513398525/170409113)\nwhich was also detected by the Fermi LAT (Longo et al. 2017, GCN 21004).\nThe GBM on-ground location is consistent with the LAT position.\n\nThe trigger resulted in an Autonomous Repoint Request (ARR)\nby the GBM Flight Software owing to the high peak flux\nof the GRB. This ARR was accepted and the spacecraft slewed to the GBM\nin-flight location. The initial angle from the Fermi LAT boresight to\nthe LAT location is 82 degrees.\n\nThe GBM light curve shows multiple peaks\nwith a duration (T90) of about 68 s (50-300 keV).\nThe time-averaged spectrum from T0+26.880 s to T0+97.537 s is\nbest fit by a Band function with Epeak = 1150 +/- 20 keV,\nalpha = -0.82 +/- 0.01, and beta = -2.84 +/- 0.06.\n\nThe event fluence (10-1000 keV) in this time interval is\n(2.956 +/- 0.009)E-04 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+38.0164 s in the 10-1000 keV band\nis 61.8 +/- 0.6 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 21005,
  "createdOn": 1491759242000,
  "email": "eb0016@uah.edu",
  "subject": "GRB 170409A: Fermi GBM Observation",
  "submitter": "Eric Burns at U of Alabama  <eb0016@uah.edu>",
  "eventId": "GRB 170409A"
}