TITLE: GCN CIRCULAR NUMBER: 43780 SUBJECT: GRB 260217A: Fermi GBM Final Localization DATE: 26/02/18 11:43:01 GMT FROM: Cuán de Barra at UCD <cuan.debarra@ucdconnect.ie> The Fermi GBM team reports the detection of a likely LONG GRB At 09:18:12.01 UT on 17 February 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260217A (trigger 793012697/260217388). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 278.43, Dec = -5.30 (J2000 degrees, equivalent to J2000 18h 34m, -5d 18'), with a statistical uncertainty of 11.59 degrees. The angle from the Fermi LAT boresight is 91 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260217388/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/bn260217388/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260217388/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/43780. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...