{
  "bibcode": "2021GCN.29996....1B",
  "body": "E. Bissaldi (Politecnico and INFN Bari) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\n\"At 11:26:39.26 UT on 11 May 2021, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 210511B (trigger 642425204 / 210511477),\nwhich was also detected by GECAM (Cai et al., GCN 29990) and\nby AGILE (Ursi et al., GCN 29991).\nThe Fermi GBM Final Real-time Localization was reported in GCN 29988.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 49 degrees.\n\nThe GBM light curve consists of a bright emission episode\nwith a duration (T90) of about 6 s (50-300 keV).\nThe time-averaged spectrum from T0 to T0+8 s is\nbest fit by a Band function with Epeak = 128 +/- 5 keV,\nalpha = -0.72 +/- 0.04, and beta = -2.47 +/- 0.10.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.04 +/- 0.02)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+4.2 s in the 10-1000 keV band\nis 23.3 +/- 0.3 ph/s/cm^2.\n\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 Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 29996,
  "createdOn": 1620769059000,
  "email": "elisabetta.bissaldi@ba.infn.it",
  "subject": "GRB 210511B: Fermi GBM observation",
  "submitter": "Elisabetta Bissaldi at INFN,Bari  <elisabetta.bissaldi@ba.infn.it>",
  "eventId": "GRB 210511B"
}