TITLE: GCN CIRCULAR NUMBER: 44226 SUBJECT: GRB 260407A: Fermi GBM Final Real-time Localization DATE: 26/04/07 09:21:29 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 09:11:07 UT on 7 Apr 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260407A (trigger 797245872.223582 / 260407383). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 71.4, Dec = 28.2 (J2000 degrees, equivalent to J2000 04h 45m, 28d 11'), with a statistical uncertainty of 2.1 degrees. The angle from the Fermi LAT boresight is 61.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260407383/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/bn260407383/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2026/bn260407383/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/44226. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...