{
  "bibcode": "2019GCN.24705....1V",
  "body": "P. Veres and C. Meegan (both UAH) report on behalf of the Fermi GBM Team:\n\n\"At 20:10:12.14 UT on 31 May 2019, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 190531B (trigger 581026217 / 190531840, GCN\n#24695), which was also detected by Fermi-LAT (GCN # 24701).\n\nThe GBM light curve consists of multiple peaks with a duration (T90) of\nabout 38.4 s (50-300 keV).\n\nThe time-averaged spectrum from T0 to T0+44.4 s is best fit by a Band\nfunction with Epeak = 473 +/- 14 keV, alpha = -0.79 +/- 0.01, and beta =\n-2.33 +/- 0.06.\n\nThe event fluence (10-1000 keV) in this time interval is (9.91 +/-\n0.08)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from\nT0+31.2 s in the 10-1000 keV band is 27.7 +/- 0.4 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary; final\nresults 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: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 24705,
  "createdOn": 1559360362000,
  "email": "veresp@gmail.com",
  "subject": "GRB 190531B: Fermi GBM observations",
  "submitter": "Peter Veres at UAH  <veresp@gmail.com>",
  "eventId": "GRB 190531B"
}