The catalogue contains compact radio sources with accurate positions observed with the Very Large Array (VLA). These sources are primarily intended for use as phase calibration sources for the Multi-Element Radio Linked Interferometer Network (MERLIN); the sources are also suitable as phase calibrators for the VLA and can be considered as candidate phase calibrators for very long-baseline interferometry (VLBI) networks. The accuracy of the position is 12 mas for sources in Paper I, 14 mas for sources in Paper II, and 55 mas for sources in Paper III.

Cone search capability for table VIII/60/calib (Jodrell Bank VLA Astrometric Survey (JVAS) list of phase calibrators)

Cone search capability for table VIII/60/notcalib (JVAS list of sources found in the survey which are not suitable as calibrators)