{
  "bibcode": "2026GCN.43316....1F",
  "eventId": "GRB 260104B",
  "submittedHow": "web",
  "circularId": 43316,
  "createdOn": 1767513023370,
  "subject": "GRB 260104B: Fermi GBM Final Localization",
  "format": "text/plain",
  "submitter": "Rushikesh Sonawane  at IISER, TVM <rushikesh23@iisertvm.ac.in>",
  "body": "The Fermi GBM team reports the detection of a likely LONG GRB\n\n\"At 05:49:57.62 UT on 04 January 2026, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB 260104B (trigger 789198602/260104243).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 87.42, Dec = -29.65 (J2000 degrees, equivalent to J2000 05h 49m, -29d 39'),\nwith a statistical uncertainty of 10.28 degrees.\n\nThe angle from the Fermi LAT boresight is 42 degrees.\n\nThe skymap can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260104243/quicklook/glg_skymap_all_bn260104243.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/bn260104243/quicklook/glg_healpix_all_bn260104243.fit\n\nThe GBM light curve can be found here:\nhttps://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260104243/quicklook/glg_lc_medres34_bn260104243.gif\""
}