TITLE: GCN CIRCULAR NUMBER: 41964 SUBJECT: GRB 250924B: Fermi GBM Final Localization DATE: 25/09/24 13:25:19 GMT FROM: Padraig McDermott at University College Dublin <padraig.mcdermott@ucdconnect.ie> The Fermi GBM team reports the detection of a likely SHORT GRB "At 10:26:58.90 UT on 24 September 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB250924B (trigger 780402423/250924435). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 306.44, Dec = -61.82 (J2000 degrees, equivalent to J2000 20h 25m, -61d 49'), with a statistical uncertainty of 9.50 degrees. The angle from the Fermi LAT boresight is 150 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250924435/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/bn250924435/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250924435/q..." View this GCN Circular online at https://gcn.nasa.gov/circulars/41964. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...