TITLE: GCN CIRCULAR NUMBER: 43003 SUBJECT: GRB 251126B: Fermi GBM Final Localization DATE: 25/12/05 17:22:08 GMT FROM: Boyan A. Hristov at UAH <bah0046@uah.edu> The Fermi GBM team reports the detection of a likely LONG GRB "At 15:57:02.80 UT on 26 November 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251126B (trigger 785865427/251126665). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 321.15, Dec = -28.24 (J2000 degrees, equivalent to J2000 21h 24m, -28d 14'), with a statistical uncertainty of 14.32 degrees. The angle from the Fermi LAT boresight is 73 degrees. The skymap can be found here: sftp://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251126665/quicklook/glg_skymap_all_bn251126665.png The HEALPix FITS file, including the estimated localization systematic, can be found here: sftp://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251126665/quicklook/glg_healpix_all_bn251126665.fit The GBM light curve can be found here: sftp://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251126665/quicklook/glg_lc_medres34_bn251126665.gif" View this GCN Circular online at https://gcn.nasa.gov/circulars/43003. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...