TITLE: GCN CIRCULAR NUMBER: 42595 SUBJECT: GRB 251105C: Fermi GBM Final Localization Correction DATE: 25/11/05 21:49:53 GMT FROM: Angus Jameson <abj0023@uah.edu> The Fermi GBM team reports the detection of a likely LONG GRB "At 18:45:56.05 UT on 05 November 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251105C (trigger 784061161/251105782). This trigger was initially classified as Below horizon by the flight software, but is in fact a GRB. The on-ground calculated location, using the Fermi GBM trigger data, is RA = 212.18, Dec = 37.29 (J2000 degrees, equivalent to J2000 14h 8m, +37d 17'), with a statistical uncertainty of 11.28 degrees. The angle from the Fermi LAT boresight is 68 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251105782/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/bn251105782/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251105782/q..." View this GCN Circular online at https://gcn.nasa.gov/circulars/42595. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...