TITLE: GCN CIRCULAR NUMBER: 43690 SUBJECT: GRB 260210C: Fermi GBM Final Real-time Localization DATE: 26/02/10 20:00:13 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 19:49:42 UT on 10 Feb 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260210C (trigger 792445787.668744 / 260210826). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 338.7, Dec = 22.6 (J2000 degrees, equivalent to J2000 22h 34m, 22d 36'), with a statistical uncertainty of 7.5 degrees. The angle from the Fermi LAT boresight is 26.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260210826/q... The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260210826/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260210826/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/43690. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...