The Double Quasar 0957+561: Examination of the Gravitational Lens Hypothesis Using the Very Large Array

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Science  02 May 1980:
Vol. 208, Issue 4443, pp. 495-497
DOI: 10.1126/science.208.4443.495


A full 12-hour synthesis at 6-centimeter wavelength with the Very Large Array confirms the major features previously reported for the double quasar 0957+561. In addition, the existence of radio jets apparently associated with both quasars is demonstrated. Gravitational lens models are now favored on the basis of recent optical observations, and the radio jets place severe constraints on such models. Further radio observations of the double quasar are needed to establish the expected relative time delay in variations between the images.