Abstract

Previous VLBI observations of the peculiar superluminal quasar 4C 39.25 at wavelengths λ=1.3, 2.8, and 3.6 cm have revealed the presence of a superluminal component (b) moving between the western component (c) and the eastern component (a). Here we combine data published previously and reanalyzed by us with new VLBI observations between 1986 and 1989 at these wavelengths. Components a and c have remained fixed relative to each other, while component b has slowed down and brightened as it approaches component a

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