{
  "bibcode": "2019GCN.25938....1B",
  "body": "E. Bissaldi (Politecnico & INFN Bari), R. Hamburg (UAH)\nand C. Meegan (UAH) report on behalf of the Fermi GBM Team:\n\n\"At 06:41:50.58 UT on 1 October 2019, the Fermi Gamma-Ray\nBurst Monitor (GBM) triggered and located GRB 191001A\n(trigger 591604915 / 191001279). The on-ground calculated\nlocation has been reported in GCN #25893, and an IPN\nannulus consistent with the GBM localization was reported\nin GCN #25926. The ATLAS and DDOTI (GCN #25911) optical\ncounterpart position are consistent with the GBM localization.\n\nThe GBM light curve consists of several pulses\nwith a duration (T90) of about 24 s (50-300 keV).\nThe time-averaged spectrum from T0-4.99 s to T0+25.73 s\nis best fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -0.8 +/- 0.1\nand the cutoff energy, parameterized as Epeak, is 114 +/- 9 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(4.7 +/- 0.2)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+15.7 s in the 10-1000 keV band\nis 10.5 +/- 0.4 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support\nPage:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 25938,
  "createdOn": 1570124568000,
  "email": "rkh0007@uah.edu",
  "subject": "GRB 191001A: Fermi GBM observation",
  "submitter": "Rachel Hamburg at UAH  <rkh0007@uah.edu>",
  "eventId": "GRB 191001A"
}