{
  "bibcode": "2018GCN.22965....1H",
  "body": "R. Hamburg (UAH) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 18:18:24.46 UT on 18 July 2018, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 180718B (trigger 553630709 / 180718763).\nwhich was also detected by the Fermi LAT (Racusin et al. 2018, GCN 22961).\nThe GBM on-ground location is consistent with the LAT position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 48\ndegrees.\n\nThe GBM light curve shows a structured FRED-like peak\nwith a duration (T90) of about 98 s (50-300 keV).\nThe time-averaged spectrum from T0+0 s to T0+66 s is\nbest fit by a power law function with an exponential\nhigh-energy cutoff.  The power law index is -0.73 +/- 0.05 and\nthe cutoff energy, parameterized as Epeak, is 761 +/- 78 keV.\nA Band function also fits the spectrum with Epeak = 731 +/- 83 keV,\nalpha = -0.71 +/- 0.05,and beta = -2.79 +/- 0.73.\n\nThe event fluence (10-1000 keV) in this time interval is\n(2.6 +/- 0.1)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+1.6 s in the 10-1000 keV band\nis 3.6 +/- 0.2 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 22965,
  "createdOn": 1532009251000,
  "email": "rkh0007@uah.edu",
  "subject": "GRB 180718B: Fermi GBM detection",
  "submitter": "Rachel Hamburg at UAH  <rkh0007@uah.edu>",
  "eventId": "GRB 180718B"
}