Five objects mapped as part of a VLBI survey have been re-observed at 5 GHz, and four of them have also been observed at 10 GHz. Three of the objects show no substantial structural variations. One object (0711+356) shows structural variations which are mostly simply described in terms of a superluminal contraction. The remaining object 3C 371 shows substantial structural variations which suggest that it probably is a superluminal source.
VLBI and Compact Radio Sources
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