{
  "circularId": 41846,
  "bibcode": "2025GCN.41846....1F",
  "eventId": "GRB 250917B",
  "subject": "GRB 250917B: Fermi GBM Final Real-time Localization",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "createdOn": 1758091087438,
  "submittedHow": "email",
  "body": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\nAt 06:27:44 UT on 17 Sep 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250917B (trigger 779783269.329994 / 250917269).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 275.0, Dec = 29.0 (J2000 degrees, equivalent to J2000 18h 19m, 29d 00'), with a statistical uncertainty of 6.2 degrees.\n\nThe angle from the Fermi LAT boresight is 25.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250917269/quicklook/glg_skymap_all_bn250917269.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/bn250917269/quicklook/glg_healpix_all_bn250917269.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250917269/quicklook/glg_lc_medres34_bn250917269.gif\n"
}