TITLE: GCN CIRCULAR NUMBER: 45377 SUBJECT: GRB 260813A: Fermi GBM Final Real-time Localization DATE: 26/08/13 19:26:57 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 19:16:22 UT on 13 Aug 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260813A (trigger 808341387.08523 / 260813803). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 231.4, Dec = -57.8 (J2000 degrees, equivalent to J2000 15h 25m, -57d 47'), with a statistical uncertainty of 2.5 degrees. The angle from the Fermi LAT boresight is 46.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260813803/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/bn260813803/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260813803/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/45377. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...