TITLE: GCN CIRCULAR NUMBER: 43804 SUBJECT: GRB 260222A: Fermi GBM Final Real-time Localization DATE: 26/02/22 10:20:22 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 10:09:38 UT on 22 Feb 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260222A (trigger 793447783.750804 / 260222423). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 336.2, Dec = 61.7 (J2000 degrees, equivalent to J2000 22h 24m, 61d 42'), with a statistical uncertainty of 4.4 degrees. The angle from the Fermi LAT boresight is 36.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260222423/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/bn260222423/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260222423/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/43804. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...