{
  "subject": "GRB 251208B: Fermi GBM Final Real-time Localization",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 10:17:17 UT on 8 Dec 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251208B (trigger 786881842.294214 / 251208429).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 212.3, Dec = 30.1 (J2000 degrees, equivalent to J2000 14h 09m, 30d 06'), with a statistical uncertainty of 5.8 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/bn251208429/quicklook/glg_skymap_all_bn251208429.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/bn251208429/quicklook/glg_healpix_all_bn251208429.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251208429/quicklook/glg_lc_medres34_bn251208429.gif\n",
  "bibcode": "2025GCN.43028....1F",
  "circularId": 43028,
  "eventId": "GRB 251208B",
  "createdOn": 1765189673284,
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "submittedHow": "email"
}