The 1.4 mm core of centaurus a: First vlbi results with the south pole telescope

NSF [AST-1207752, AST-1440254, AST-1207704, AST-1310896, AST-1207730, AST-1402161]; ERC Synergy Grant "BlackHoleCam: Imaging the Event Horizon of Black Holes" [610058]; MINECO [AYA-2012-38491-C02-01, AYA2015-63939-C2-2-P]; Generalitat Valenciana [PROMETEOII/2014/057]; National Science Foundation [PLR-1248097]; NSF Physics Frontier Center grant to the Kavli Institute of Cosmological Physics at the University of Chicago [PHY-0114422]; Kavli Foundation; Gordon and Betty Moore Foundation through Grant GBMF [947]; Smithsonian Institution; Academia Sinica