TITLE: GCN CIRCULAR NUMBER: 35434 SUBJECT: GRB 231230A: Fermi GBM Final Real-time Localization DATE: 23/12/30 01:39:51 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 01:29:10 UT on 30 Dec 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 231230A (trigger 725592555.052228 / 231230062). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 240.7, Dec = 53.6 (J2000 degrees, equivalent to J2000 16h 02m, 53d 36'), with a statistical uncertainty of 5.2 degrees. The angle from the Fermi LAT boresight is 157.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231230062/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/bn231230062/q... The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn231230062/q... View this GCN Circular online at https://gcn.nasa.gov/circulars/35434. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...