TITLE: GCN CIRCULAR NUMBER: 34726 SUBJECT: GRB 230918A: Fermi GBM Final Real-time Localization DATE: 23/09/18 10:03:09 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 09:52:36 UT on 18 Sep 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230918A (trigger 716723561.504536 / 230918412). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 222.5, Dec = -11.6 (J2000 degrees, equivalent to J2000 14h 50m, -11d 35'), with a statistical uncertainty of 17.1 degrees. The angle from the Fermi LAT boresight is 63.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230918412/quicklook/glg_skymap_all_bn230918412.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/bn230918412/quicklook/glg_healpix_all_bn230918412.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230918412/quicklook/glg_lc_medres34_bn230918412.gif