TITLE: GCN CIRCULAR NUMBER: 41895 SUBJECT: GRB 250920A: Fermi GBM Final Localization DATE: 25/09/20 05:05:52 GMT FROM: Jacob Smith at Fermi-GBM Team <jrs0118@uah.edu> The Fermi GBM team reports the detection of a likely LONG GRB "At 02:54:06.82 UT on 20 September 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250920 (trigger 780029651/250920121). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 175.27, Dec = 48.96 (J2000 degrees, equivalent to J2000 11h 41m, +48d 57'), with a statistical uncertainty of 1.00 degrees. The angle from the Fermi LAT boresight is 88 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250920121/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/bn250920121/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250920121/q..." View this GCN Circular online at https://gcn.nasa.gov/circulars/41895. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...