{
  "bibcode": "2017GCN.21715....1P",
  "body": "S. Poolakkil (UAH), E. Bissaldi (Politecnico & INFN Bari) and C. Meegan\n(UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 08:51:07.51 UT on 26 August 2017, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 170826A (trigger 525430272/ 170826369).\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 82.4, DEC = 32.8, with an uncertainty\nof 7.2 degrees (radius, 1-sigma containment,\nstatistical only; there is additionally a systematic\nerror which we have characterized as a core-plus-tail model, with 90% of\nGRBs having a 3.7 deg error and a small tail suffering a larger than 10 deg\nsystematic error. [Connaughton et al. 2015, ApJS, 216, 32] ).\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 101\ndegrees.\n\nThe GBM triggered on a single pulse over a\ntotal duration (T90) of about 0.2 s (50-300 keV).\nThe time-averaged spectrum from T0-0.2 to T0+0.1 s is\nbest fit by a power law function with an exponential\nhigh-energy cutoff. The power law index is -1.05 +/- 0.11 and\nthe cutoff energy, parameterized as Epeak, is 685 +/- 236 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n (8.2 +/- 0.6)E-07 erg/cm^2. The 64 ms peak photon flux measured\nstarting from T0+0.1 s in the 10-1000 keV band\nis 18.6 +/- 2.1 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"\n\n-- \nSuraj Poolakkil\nFermi GBM Graduate Research Assistant\nDept. of Space Science\nUniversity of Alabama in Huntsville",
  "circularId": 21715,
  "createdOn": 1503774017000,
  "email": "sp0076@uah.edu",
  "subject": "GRB 170826A: Fermi GBM detection",
  "submitter": "Suraj Poolakkil at UAH  <sp0076@uah.edu>",
  "eventId": "GRB 170826A"
}