{
  "createdOn": 1742518387632,
  "subject": "GRB 250321A: Fermi GBM Final Real-time Localization",
  "bibcode": "2025GCN.39793....1F",
  "circularId": 39793,
  "eventId": "GRB 250321A",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "submittedHow": "email",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 00:42:39 UT on 21 Mar 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250321A (trigger 764210564.016716 / 250321030).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 299.0, Dec = 17.1 (J2000 degrees, equivalent to J2000 19h 56m, 17d 06'), with a statistical uncertainty of 6.3 degrees.\n\nThe angle from the Fermi LAT boresight is 44.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250321030/quicklook/glg_skymap_all_bn250321030.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/bn250321030/quicklook/glg_healpix_all_bn250321030.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250321030/quicklook/glg_lc_medres34_bn250321030.gif\n"
}