{
  "bibcode": "2017GCN.21992....1P",
  "body": "S. Poolakkil and C. Meegan (UAH) report on behalf of the Fermi GBM Team:\n\n\"At 19:00:50.58 UT on 10 October 2017, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 171010A (trigger 529354855 / 171010792)\nwhich was also detected by Fermi LAT (N. Omodei et al. 2017, GCN 21985) and\nAstroSat (Sharma et al, GCN 21990). The afterglow was observed by Swift-XRT\n(A. D'Ai  et al. 2017, GCN 21989). The GBM on-ground location is consistent\nwith\nthe LAT position.\n\nThe trigger resulted in an Autonomous Repoint Request (ARR)\nby the GBM Flight Software owing to the high peak flux of the GRB.\nThis ARR was accepted and the spacecraft slewed to the GBM in-flight\nlocation. The initial angle from the Fermi LAT boresight to\nthe best location is 113 degrees.\n\nThe GBM light curve consists of several episodes\nwith a duration (T90) of about 104 s (50-300 keV).\nThe time-averaged spectrum from T0+5.12 s to T0+151.55 s is\nbest fit by a Band function with Epeak = 154 +/- 1 keV, alpha = -1.11 +/-\n0.01\nand beta = -2.22 +/- 0.01.\n\nThe event fluence (10-1000 keV) in this time interval is\n6.42E-04 +/- 1.5E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+68.16 s in the 10-1000 keV band\nis 117.5 +/- 1.02 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 21992,
  "createdOn": 1507739598000,
  "email": "sp0076@uah.edu",
  "subject": "GRB 171010A: Fermi GBM observation",
  "submitter": "Suraj Poolakkil at UAH  <sp0076@uah.edu>",
  "eventId": "GRB 171010A"
}