{
  "createdOn": 1744819029639,
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 15:46:42 UT on 16 Apr 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250416B (trigger 766511207.410564 / 250416657).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 103.8, Dec = -62.2 (J2000 degrees, equivalent to J2000 06h 55m, -62d 12'), with a statistical uncertainty of 1.0 degrees.\n\nThe angle from the Fermi LAT boresight is 166.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250416657/quicklook/glg_skymap_all_bn250416657.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/bn250416657/quicklook/glg_healpix_all_bn250416657.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250416657/quicklook/glg_lc_medres34_bn250416657.gif\n",
  "submittedHow": "email",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "circularId": 40150,
  "bibcode": "2025GCN.40150....1F",
  "eventId": "GRB 250416B",
  "subject": "GRB 250416B: Fermi GBM Final Real-time Localization"
}