TITLE: GCN CIRCULAR NUMBER: 44331 SUBJECT: GRB 260417B: Fermi GBM Final Real-time Localization DATE: 26/04/17 15:54:29 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov> The Fermi GBM team reports the detection of a likely LONG GRB At 15:43:55 UT on 17 Apr 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260417B (trigger 798133440.23068 / 260417655). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 264.8, Dec = -27.4 (J2000 degrees, equivalent to J2000 17h 39m, -27d 23'), with a statistical uncertainty of 8.4 degrees. The angle from the Fermi LAT boresight is 29.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260417655/q... The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260417655/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260417655/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/44331. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...