{
  "eventId": "GRB 250307A",
  "submittedHow": "email",
  "createdOn": 1741378094055,
  "subject": "GRB 250307A: Fermi GBM Final Real-time Localization",
  "submitter": "Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>",
  "bibcode": "2025GCN.39618....1F",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\nAt 19:57:53 UT on 7 Mar 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250307A (trigger 763070278.733804 / 250307832).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is RA = 265.6, Dec = 2.2 (J2000 degrees, equivalent to J2000 17h 42m, 2d 12'), with a statistical uncertainty of 2.7 degrees.\n\nThe angle from the Fermi LAT boresight is 82.0 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250307832/quicklook/glg_skymap_all_bn250307832.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/bn250307832/quicklook/glg_healpix_all_bn250307832.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250307832/quicklook/glg_lc_medres34_bn250307832.gif\n",
  "circularId": 39618
}