TITLE: GCN CIRCULAR NUMBER: 34628 SUBJECT: GRB 230905A: Fermi GBM Final Real-time Localization DATE: 23/09/05 15:55:23 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 15:44:59 UT on 5 Sep 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230905A (trigger 715621504.769918 / 230905656). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 154.8, Dec = -0.8 (J2000 degrees, equivalent to J2000 10h 19m, 0d 48'), with a statistical uncertainty of 14.4 degrees. The angle from the Fermi LAT boresight is 64.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230905656/quicklook/glg_skymap_all_bn230905656.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230905656/quicklook/glg_healpix_all_bn230905656.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230905656/quicklook/glg_lc_medres34_bn230905656.gif