Answers are grounded in this paper and cite their sources.
We present a catalogue of 800 compact radio sources in the declination range |35∘ ≤ δ ≤ 75∘| whose positions have been measured to an rms accuracy of ~ 12 milliarcsec with the VLA. They are primarily intended for use as phase reference sources for the Jodrell Bank MERLIN but they will also be suitable phase calibrators for the VLA and the VLBI networks.
No takes yet. Share an insight, caveat, or question.
Patnaik et al. (1992) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: