TITLE: GCN CIRCULAR NUMBER: 44300 SUBJECT: GRB 260415B: Fermi GBM Final Localization DATE: 26/04/15 05:51:24 GMT FROM: Lorenzo Scotton at UAH <lscottongcn@outlook.com> The Fermi GBM team reports the detection of a likely LONG GRB "At 02:25:33.80 UT on 15 April 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260415B (trigger 797912738/260415101). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 229.43, Dec = 24.94 (J2000 degrees, equivalent to J2000 15h 18m, +24d 56'), with a statistical uncertainty of 9.03 degrees. The angle from the Fermi LAT boresight is 41 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260415101/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/bn260415101/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260415101/q..." View this GCN Circular online at https://gcn.nasa.gov/circulars/44300. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...