TITLE: GCN CIRCULAR NUMBER: 43653 SUBJECT: GRB 260208D: Fermi GBM Final Real-time Localization DATE: 26/02/08 21:53:17 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 21:42:45 UT on 8 Feb 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260208D (trigger 792279770.48211 / 260208905). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 327.7, Dec = -39.0 (J2000 degrees, equivalent to J2000 21h 50m, -39d 00'), with a statistical uncertainty of 6.9 degrees. The angle from the Fermi LAT boresight is 51.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260208905/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/bn260208905/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260208905/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/43653. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...