{
  "bibcode": "2024GCN.36553....1F",
  "submittedHow": "web",
  "submitter": "Cori Fletcher at USRA <cfletcher@usra.edu>",
  "body": "C. Fletcher (USRA) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 14:03:51.50 UT on 27 May 2024, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 240527B (trigger 738511436/240527586).\nwhich was also detected by Fermi LAT (R. Gupta et al. 2024, GCN 36550).\nThe Fermi GBM on-ground location (GCN 36546) is consistent with the Fermi LAT position.\n\nThe angle from the Fermi LAT boresight is 78 degrees.\n\nThe GBM light curve consists of multiple peaks with a duration (T90)\nof about 24.8 s (50-300 keV). The time-averaged spectrum\nfrom T0+0.003 to T0+29.440 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -1.07 +/- 0.03 and the cutoff energy,\nparameterized as Epeak, is 280 +/- 20 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.46 +/- 0.04)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+14 s in the 10-1000 keV band is 10.9 +/- 0.3 ph/s/cm^2.\n\nA Band function fits the spectrum equally well \nwith Epeak= 201 +/- 20 keV, alpha = -0.95 +/- 0.05 and beta = -2.1 +/- 0.1. \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/\"C. Fletcher (USRA) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 14:03:51.50 UT on 27 May 2024, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 240527B (trigger 738511436/240527586).\nwhich was also detected by Fermi LAT (R. Gupta et al. 2024, GCN 36550).\nThe Fermi GBM on-ground location (GCN 36546) is consistent with the Fermi LAT position.\n\nThe angle from the Fermi LAT boresight is 78 degrees.\n\nThe GBM light curve consists of multiple peaks with a duration (T90)\nof about 24.8 s (50-300 keV). The time-averaged spectrum\nfrom T0+0.003 to T0+29.440 s is best fit by\na power law function with an exponential high-energy cutoff.\nThe power law index is -1.07 +/- 0.03 and the cutoff energy,\nparameterized as Epeak, is 280 +/- 20 keV.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.46 +/- 0.04)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+14 s in the 10-1000 keV band is 10.9 +/- 0.3 ph/s/cm^2.\n\nA Band function fits the spectrum equally well \nwith Epeak= 201 +/- 20 keV, alpha = -0.95 +/- 0.05 and beta = -2.1 +/- 0.1. \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/\"",
  "subject": "GRB 240527B: Fermi GBM Observation",
  "circularId": 36553,
  "format": "text/plain",
  "createdOn": 1716865260751,
  "eventId": "GRB 240527B"
}