{
  "circularId": 45685,
  "submittedHow": "web",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\n\"At 21:44:37.15 UT on 21 September 2026, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 260921B (trigger 811719882/260921906).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 62.12, Dec = 31.21 (J2000 degrees, equivalent to J2000 4h 8m, +31d 12'),\nwith a statistical uncertainty of 2.22 degrees.\n\nThe angle from the Fermi LAT boresight is 107 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260921906/quicklook/glg_skymap_all_bn260921906.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/2026/bn260921906/quicklook/glg_healpix_all_bn260921906.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260921906/quicklook/glg_lc_medres34_bn260921906.gif\"",
  "submitter": "Matt Godwin <msg0028@uah.edu>",
  "eventId": "GRB 260921B",
  "subject": "GRB 260921B: Fermi GBM Final Localization",
  "eventType": [
    "GRB",
    "Gamma-ray Transient"
  ],
  "createdOn": 1790032765336,
  "format": "text/plain"
}