TITLE: GCN CIRCULAR NUMBER: 42455 SUBJECT: GRB 251026B: Fermi GBM Final Localization DATE: 25/10/26 09:48:27 GMT FROM: Marianna Dafčíková at Masaryk University <500025@mail.muni.cz> The Fermi GBM team reports the detection of a likely SHORT GRB "At 07:18:53.33 UT on 26 October 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251026B (trigger 783155938/251026305). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 132.32, Dec = -12.21 (J2000 degrees, equivalent to J2000 8h 49m, -12d 12'), with a statistical uncertainty of 8.04 degrees. The angle from the Fermi LAT boresight is 19 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251026305/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/bn251026305/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251026305/q..." View this GCN Circular online at https://gcn.nasa.gov/circulars/42455. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...