New blazars discovered by polarimetry

Optical polarimetry of a complete sample of radio sources has led to the discovery of 31 blazars and the confirmation of five others. Some of the new blazars are shown to have large redshifts and to be optically faint. It is found that there are equal numbers of objects with strong and weak emission lines, with the weak-lined objects having the largest ratios of optical to radio power. Evidence is provided for an unprecedented pair of polarized objects, only one of which is a radio source. 28 references.