TITLE: GCN CIRCULAR NUMBER: 43688 SUBJECT: GRB 260210B: Fermi GBM Final Real-time Localization DATE: 26/02/10 18:24:59 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 18:14:06 UT on 10 Feb 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260210B (trigger 792440051.126154 / 260210760). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 6.0, Dec = -48.3 (J2000 degrees, equivalent to J2000 00h 24m, -48d 17'), with a statistical uncertainty of 10.3 degrees. The angle from the Fermi LAT boresight is 22.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260210760/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/bn260210760/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260210760/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/43688. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...