TITLE: GCN CIRCULAR NUMBER: 31782 SUBJECT: GRB 220323A: Fermi GBM Final Real-time Localization DATE: 22/03/23 12:20:36 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 12:10:11 UT on 23 Mar 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220323A (trigger 669730216.566582 / 220323507). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 355.2, Dec = 71.9 (J2000 degrees, equivalent to J2000 23h 40m, 71d 54'), with a statistical uncertainty of 9.9 degrees. The angle from the Fermi LAT boresight is 25.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220323507/quicklook/glg_skymap_all_bn220323507.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/bn220323507/quicklook/glg_healpix_all_bn220323507.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220323507/quicklook/glg_lc_medres34_bn220323507.gif