{
  "bibcode": "2022GCN.31856....1B",
  "body": "E. Bissaldi (Politecnico and INFN Bari) reports on behalf of the Fermi GBM \nTeam:\n\n\n\"At 05:46:04.41 UT on 8 April 2022, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 220408A (trigger 671089569/ 220408240), which was also detected by the Swift/BAT (Caputo et al. 2022, GCN 31848). \nThe Fermi GBM Final Real-time Localization (GCN 31847) is consistent with the Swift position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 57 degrees. \n\nThe GBM light curve consists of a multipeaked emission episode with a duration (T90) of about 20 s (50-300 keV).\nThe time-averaged spectrum from T0-0.8 s to T0+6.7 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -0.72 +/- 0.14 and the cutoff energy, parameterized as Epeak, is 48.8 +/- 2.3 keV.\n\nThe event fluence (10-1000 keV) in this time interval is (1.33 +/- 0.05)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+2.4 s in the 10-1000 keV band is 7.7 +/-0.3 ph/s/cm^2. \n\n\nThe spectral analysis results presented above are preliminary; final 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: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 31856,
  "createdOn": 1649440186000,
  "email": "elisabetta.bissaldi@ba.infn.it",
  "subject": "GRB 220408A: Fermi GBM observation",
  "submitter": "Elisabetta Bissaldi at INFN,Bari  <elisabetta.bissaldi@ba.infn.it>",
  "eventId": "GRB 220408A"
}