{
  "subject": "GRB 240516A: Fermi GBM Observation",
  "submittedHow": "web",
  "eventId": "GRB 240516A",
  "bibcode": "2024GCN.36499....1B",
  "circularId": 36499,
  "createdOn": 1715900110200,
  "submitter": "sumanbala2210@gmail.com",
  "body": "S. Bala (USRA), S. Dalessi (UAH) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 03:36:24.84 UT on 16 May 2024, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 240516A (trigger 737523389/240516150).\nwhich was also detected by Swift BAT (T. M. Parsotan et al. 2024, GCN 36493).\nThe Fermi GBM on-ground location is consistent with the Swift BAT position.\n\nThe angle from the Fermi LAT boresight is 47 degrees.\n\nThe GBM light curve consists of a single emission episode with a duration (T90)\nof about 46 s (50-300 keV). The time-averaged spectrum\nfrom T0+1.0 to T0+45.1 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -0.69 +/- 0.09 and the cutoff energy,\nparameterized as Epeak, is 528 +/- 72 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.12 +/- 0.06)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+3.7 s in the 10-1000 keV band is 2.4 +/- 0.2 ph/s/cm^2.\n\nA Band function fits the spectrum equally well\nwith Epeak= 490 +/- 107 keV, alpha = -0.7 +/- 0.1 and beta = -2.1 +/- 0.3.\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/\"",
  "format": "text/plain"
}