TITLE: GCN CIRCULAR NUMBER: 32806 SUBJECT: GRB 221020A: Fermi GBM Final Real-time Localization DATE: 22/10/20 05:34:08 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 05:23:52 UT on 20 Oct 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 221020A (trigger 687936237.82563 / 221020225). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 172.9, Dec = 16.0 (J2000 degrees, equivalent to J2000 11h 31m, 16d 00'), with a statistical uncertainty of 3.0 degrees. The angle from the Fermi LAT boresight is 36.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221020225/quicklook/glg_skymap_all_bn221020225.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/bn221020225/quicklook/glg_healpix_all_bn221020225.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn221020225/quicklook/glg_lc_medres34_bn221020225.gif