TITLE: GCN CIRCULAR NUMBER: 31640 SUBJECT: GRB 220223A: Fermi GBM Final Real-time Localization DATE: 22/02/23 02:25:39 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 02:15:16 UT on 23 Feb 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220223A (trigger 667275321.995302 / 220223094). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 26.2, Dec = -20.2 (J2000 degrees, equivalent to J2000 01h 44m, -20d 11'), with a statistical uncertainty of 14.6 degrees. The angle from the Fermi LAT boresight is 52.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220223094/quicklook/glg_skymap_all_bn220223094.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220223094/quicklook/glg_healpix_all_bn220223094.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220223094/quicklook/glg_lc_medres34_bn220223094.gif