TITLE: GCN CIRCULAR NUMBER: 35258 SUBJECT: GRB 231204A: Fermi GBM Final Real-time Localization DATE: 23/12/04 20:10:25 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 20:00:03 UT on 4 Dec 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231204A (trigger 723412808.99994 / 231204833). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 324.4, Dec = 54.7 (J2000 degrees, equivalent to J2000 21h 37m, 54d 42'), with a statistical uncertainty of 2.4 degrees. The angle from the Fermi LAT boresight is 19.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231204833/q... The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231204833/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231204833/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/35258. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...