Sub-parsec scale imaging of Centaurus A

Abstract. At a distance of about 3.4 Mpc, the radio galaxy Centaurus A is the closest active galaxy. Therefore it is a key target for studying the innermost regions of active galactic nuclei (AGN). VLBI observations conducted within the framework of the TANAMI program enable us to study the central region of the Cen A jet with some of the highest linear resolutions ever achieved in an AGN. This region is the likely origin of the I-ray emission recently detccted by the Fermi Large Area Telescope (LAT). TANAMI monitors a sample of radio and "I-ray selected extragalactic jets south of _300 declination at 8.4 GHz and 22.3 GHz with the Australian Long Baseline Array (LEA) and the transoceanic antennas Hartebeesthoek in South Africa, the 6 m Transportable Integrated Geodeti