{
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 02:40:59 UT on 11 Dec 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251211A (trigger 787113664.18548 / 251211112).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 181.9, Dec = -32.3 (J2000 degrees, equivalent to J2000 12h 07m, -32d 17'), with a statistical uncertainty of 6.4 degrees.\n\nThe angle from the Fermi LAT boresight is 28.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251211112/quicklook/glg_skymap_all_bn251211112.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/bn251211112/quicklook/glg_healpix_all_bn251211112.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251211112/quicklook/glg_lc_medres34_bn251211112.gif\n",
  "subject": "GRB 251211A: Fermi GBM Final Real-time Localization",
  "circularId": 43069,
  "submittedHow": "email",
  "eventId": "GRB 251211A",
  "bibcode": "2025GCN.43069....1F",
  "createdOn": 1765421495985
}