TITLE: GCN CIRCULAR NUMBER: 38488 SUBJECT: GRB 241209D: Fermi GBM Final Real-time Localization DATE: 24/12/09 11:10:17 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 10:59:44 UT on 9 Dec 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241209D (trigger 755434789.093062 / 241209458). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 191.7, Dec = -2.2 (J2000 degrees, equivalent to J2000 12h 46m, -2d 12'), with a statistical uncertainty of 1.9 degrees. The angle from the Fermi LAT boresight is 80.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241209458/q... The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241209458/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241209458/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/38488. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...