TITLE: GCN CIRCULAR NUMBER: 40652 SUBJECT: GRB 250609A: Fermi GBM Final Real-time Localization DATE: 25/06/09 08:57:49 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 08:47:18 UT on 9 Jun 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250609A (trigger 771151643.61016 / 250609366). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 150.6, Dec = -8.4 (J2000 degrees, equivalent to J2000 10h 02m, -8d 24'), with a statistical uncertainty of 36.2 degrees. The angle from the Fermi LAT boresight is 81.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250609366/q... The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250609366/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250609366/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/40652. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...