{
  "bibcode": "2025GCN.42790....1F",
  "circularId": 42790,
  "body": "The Fermi GBM team reports the detection of a likely SHORT GRB\n\nAt 16:30:58 UT on 21 Nov 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251121A (trigger 785435463.990588 / 251121688).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 250.6, Dec = -19.8 (J2000 degrees, equivalent to J2000 16h 42m, -19d 48'), with a statistical uncertainty of 19.5 degrees.\n\nThe angle from the Fermi LAT boresight is 100.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251121688/quicklook/glg_skymap_all_bn251121688.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/bn251121688/quicklook/glg_healpix_all_bn251121688.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251121688/quicklook/glg_lc_medres34_bn251121688.gif\n",
  "createdOn": 1763743296868,
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "eventId": "GRB 251121A",
  "subject": "GRB 251121A: Fermi GBM Final Real-time Localization",
  "submittedHow": "email"
}