TITLE: GCN CIRCULAR NUMBER: 38682 SUBJECT: GRB 241228B: Fermi GBM Final Real-time Localization DATE: 24/12/28 04:23:41 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 04:13:05 UT on 28 Dec 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241228B (trigger 757051990.391412 / 241228176). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 122.2, Dec = 14.0 (J2000 degrees, equivalent to J2000 08h 08m, 14d 00'), with a statistical uncertainty of 1.7 degrees. The angle from the Fermi LAT boresight is 49.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241228176/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/bn241228176/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241228176/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/38682. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...