{
  "createdOn": 1761646322580,
  "submittedHow": "web",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\n\"At 07:48:06.71 UT on 28 October 2025, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 251028B (trigger 783330491/251028325).\nThis trigger was initially classified as Distant Particles by the flight software,\nbut is in fact a GRB.\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 337.82, Dec = 45.75 (J2000 degrees, equivalent to J2000 22h 31m, +45d 45'),\nwith a statistical uncertainty of 3.69 degrees.\n\nThe angle from the Fermi LAT boresight is 119 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251028325/quicklook/glg_skymap_all_bn251028325.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/bn251028325/quicklook/glg_healpix_all_bn251028325.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251028325/quicklook/glg_lc_medres34_bn251028325.gif\"",
  "bibcode": "2025GCN.42502....1F",
  "submitter": "Christian Malacaria at INAF-OAR <cmalacaria.astro@gmail.com>",
  "subject": "GRB 251028B: Fermi GBM Final Localization Correction",
  "circularId": 42502,
  "eventId": "GRB 251028B",
  "format": "text/plain"
}