TITLE: GCN CIRCULAR NUMBER: 42202 SUBJECT: GRB 251011C: Fermi GBM Final Real-time Localization DATE: 25/10/11 22:22:00 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 LONG GRB At 22:11:20 UT on 11 Oct 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 251011C (trigger 781913485.841388 / 251011925). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 164.7, Dec = -2.9 (J2000 degrees, equivalent to J2000 10h 58m, -2d 53'), with a statistical uncertainty of 4.6 degrees. The angle from the Fermi LAT boresight is 48.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251011925/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/bn251011925/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn251011925/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/42202. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...