TITLE: GCN CIRCULAR NUMBER: 44481 SUBJECT: GRB 260506A: Fermi GBM Final Real-time Localization DATE: 26/05/06 06:39:24 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 06:28:48 UT on 6 May 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260506A (trigger 799741733.38117 / 260506270). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 145.7, Dec = 76.1 (J2000 degrees, equivalent to J2000 09h 42m, 76d 05'), with a statistical uncertainty of 7.2 degrees. The angle from the Fermi LAT boresight is 18.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260506270/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/bn260506270/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260506270/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/44481. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...