Improved Positions and Some Optical Identifications for 451 4C Radio Sources Between Declinations 4° and 20°

Abstract

Accurate positions have been measured at Parkes for 451 40 radio sources between declinations 4° and 20°. For most of the sources the r.m.s. uncertainty is ± ION arc in each coordinate. Optical identifications are suggested for 94 sources, of which 22 are galaxies and 72 are possible quasi.stellar objects.