{
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 15:28:57 UT on 5 Mar 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250305A (trigger 762881342.919284 / 250305645).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 223.7, Dec = -3.0 (J2000 degrees, equivalent to J2000 14h 54m, -3d 00'), with a statistical uncertainty of 5.0 degrees.\n\nThe angle from the Fermi LAT boresight is 60.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250305645/quicklook/glg_skymap_all_bn250305645.png\n\nThe HEALPix FITS file, including the estimated localization systematic, can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250305645/quicklook/glg_healpix_all_bn250305645.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250305645/quicklook/glg_lc_medres34_bn250305645.gif\n",
  "bibcode": "2025GCN.39597....1F",
  "subject": "GRB 250305A: Fermi GBM Final Real-time Localization",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "circularId": 39597,
  "submittedHow": "email",
  "createdOn": 1741189171439,
  "eventId": "GRB 250305A"
}