{
  "submitter": "Elisabetta Bissaldi at Politecnico and INFN Bari <elisabetta.bissaldi@ba.infn.it>",
  "createdOn": 1709738030430,
  "circularId": 35888,
  "subject": "GRB 240305A: Fermi GBM observation",
  "submittedHow": "web",
  "body": "E. Bissaldi (Politecnico and INFN Bari) and C. Meegan (UAH)\nreport on behalf of the Fermi GBM Team:\n\n\"At 09:49:21.26 UT on 05 March 2024, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 240305A (trigger 731324966 / 240305409),\nwhich was also detected by the Swift/BAT GUANO (DeLaunay et al. 2024, GCN 35880).\nThe Fermi GBM Final Real-time Localization (GCN 35869)\nis consistent with the Swift position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 56 degrees.\n\nThe GBM light curve consists of a single weak emission episode\nwith a duration (T90) of about 13 s (50-300 keV).\nThe time-averaged spectrum from T0-2.3 s to T0+10.2 s is\nbest fit by a simple power law function with index -2.06 +/- 0.07.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.29 +/- 0.12)e-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+2.0 s in the 10-1000 keV band\nis 2.05 +/- 0.19 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/\"",
  "bibcode": "2024GCN.35888....1B",
  "eventId": "GRB 240305A"
}