TITLE: GCN CIRCULAR NUMBER: 44676 SUBJECT: GRB 260520B: Fermi GBM Final Localization DATE: 26/05/20 18:00:48 GMT FROM: Cuán de Barra at UCD <cuan.debarra@ucdconnect.ie> The Fermi GBM team reports the detection of a likely LONG GRB "At 09:35:52.73 UT on 20 May 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB260520B (trigger 800962557/260520400). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 346.68, Dec = 39.68 (J2000 degrees, equivalent to J2000 23h 6m, -39d 40'), with a statistical uncertainty of 14 degrees. The angle from the Fermi LAT boresight is 21 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260520400/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/bn260520400/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260520400/q..." View this GCN Circular online at https://gcn.nasa.gov/circulars/44676. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...