{
  "bibcode": "2023GCN.33806....1R",
  "body": "O.J. Roberts (USRA/NASA-MSFC), S. Bala (USRA), J. Wood (NASA-MSFC) and\nC. Meegan (UAH) report on behalf of the Fermi GBM Team:\n\n\"At 21:21:34.01 UT on 10 May 2023, the Fermi Gamma-Ray Burst Monitor (GBM)\ntriggered and located GRB 230510B (trigger 705446499 /230510890), which\nwas also detected by MAXI/GSC (M. Nakajima et al. 2023, GCN 33760),\nCALET (P.S. Marrocchesi et al. 2023, GCN 33763), and CZTI/AstroSat \n(P.K. Navaneeth et al. 2023, GCN 33772). The Fermi GBM Final Real-time\n Localization (GCN 33759) is consistent with the MAXI/GSC position.\n\nThe angle from the Fermi LAT boresight at the GBM trigger time is 60 degrees.\n\nThe GBM light curve consists of two distinct peaks with multiple short\npeaks in between with a duration (T90) of about 466 s (50-300 keV).\nThe time-averaged spectrum from T0-5.12 s to T0+650.81 s is\nbest fit by a Band function, with Epeak= 341 +/- 28 keV,\nalpha = -1.32 +/- 0.02, and beta = -2.01 +/- 0.06.\n\nThe event fluence (10-1000 keV) in this time interval is\n(1.28 +/- 0.01)E-04 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+194 s in the 10-1000 keV band\nis 8.12 +/- 0.26 ph/s/cm^2.\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": 33806,
  "eventId": "GRB 230510B",
  "subject": "GRB 230510B: Fermi GBM detection",
  "createdOn": 1684272182341,
  "submitter": "sumanbala2210@gmail.com"
}