TITLE: GCN CIRCULAR NUMBER: 41944 SUBJECT: GRB 250922B: Fermi GBM Final Real-time Localization DATE: 25/09/22 21:24:08 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 21:13:25 UT on 22 Sep 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250922B (trigger 780268410.863384 / 250922884). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 48.7, Dec = 30.7 (J2000 degrees, equivalent to J2000 03h 14m, 30d 41'), with a statistical uncertainty of 13.4 degrees. The angle from the Fermi LAT boresight is 90.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250922884/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/bn250922884/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250922884/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/41944. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...