TITLE: GCN CIRCULAR NUMBER: 44674 SUBJECT: GRB 260520A: Fermi GBM Final Localization DATE: 26/05/20 06:47:26 GMT FROM: Lorenzo Scotton at UAH <lscottongcn@outlook.com> The Fermi GBM team reports the detection of a likely LONG GRB "At 01:24:47.42 UT on 20 May 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260520A (trigger 800933092/260520059). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 191.01, Dec = -34.56 (J2000 degrees, equivalent to J2000 12h 44m, -34d 33’), with a statistical uncertainty of 14 degrees. The angle from the Fermi LAT boresight is 114 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260520059/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/bn260520059/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260520059/q..." View this GCN Circular online at https://gcn.nasa.gov/circulars/44674. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...