{
  "circularId": 39006,
  "eventId": "GRB 250121A",
  "bibcode": "2025GCN.39006....1F",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 23:36:05 UT on 21 Jan 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250121A (trigger 759195370.779232 / 250121983).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 225.1, Dec = -36.9 (J2000 degrees, equivalent to J2000 15h 00m, -36d 53'), with a statistical uncertainty of 1.1 degrees.\n\nThe angle from the Fermi LAT boresight is 16.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250121983/quicklook/glg_skymap_all_bn250121983.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/bn250121983/quicklook/glg_healpix_all_bn250121983.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250121983/quicklook/glg_lc_medres34_bn250121983.gif\n",
  "submittedHow": "email",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "subject": "GRB 250121A: Fermi GBM Final Real-time Localization",
  "createdOn": 1737503195810
}