AzTEC 1.1-mm images of 16 radio galaxies at 0.5 < z < 5.2 and a quasar at z=6.3

We present 1.1-mm observations for a sample of 16 powerful radio galaxies at 0.5 < z < 5.2 and a radio-quiet quasar at z = 6.3, obtained using the AzTEC bolometer array mounted on the Atacama Submillimetre Telescope Experiment (ASTE) or the James Clerk Maxwell Telescope (JCMT). This paper more than doubles the number of high-z radio galaxies imaged at millimetre/submillimetre wavelengths. We detect probable millimetre-wave counterparts for 11 of the active galaxies. The six active galaxies that do not have a probable millimetre counterpart in our images nevertheless have one or more likely associated millimetric source. Thus, we conclude that powerful (radio-loud) active galaxies at high-z are beacons for finding luminous millimetre/submillimetre galaxies at high-z. The flux densities of our AzTEC counterparts imply star formation rates ranging from <200 to similar to 1300 M? yr-1. In addition, we find that for the radio galaxies the 1.1-mm flux density is anticorrelated with the largest angular size of the radio source.