TITLE: GCN CIRCULAR NUMBER: 44523 SUBJECT: GRB 260510D: Fermi GBM Final Real-time Localization DATE: 26/05/10 20:48:45 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 SHORT GRB At 20:38:08 UT on 10 May 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260510D (trigger 800138293.771294 / 260510860). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 3.0, Dec = 37.4 (J2000 degrees, equivalent to J2000 00h 12m, 37d 23'), with a statistical uncertainty of 13.9 degrees. The angle from the Fermi LAT boresight is 61.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260510860/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/bn260510860/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260510860/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/44523. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...