A range of time delays for the double quasar 0957 + 561 A, B

C. C. Dyer; R. C. Roeder

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The Astrophysical Journal

Article . 1980 . Peer-reviewed

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https://dx.doi.org/10.1086/183...

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A range of time delays for the double quasar 0957 + 561 A, B

descriptionPublicationkeyboard_double_arrow_right Article 01 Nov 1980 English Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 241, page L133 (issn: 0004-637X, eissn: 1538-4357,

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Authors: C. C. Dyer; R. C. Roeder;

doi: 10.1086/183376

A range of time delays for the double quasar 0957 + 561 A, B

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Abstract

We have extended the complex formalism of Bourassa and Kantowski for a transparent gravitational lens to a multilens situation. By using a grid of assumed positions for the cluster center within its measured error box, we have then calculated a range of possible time delays between the two images, A and B. The results indicate a range from 0.03 yr to 1.7 yr, which is somewhat smaller than might have been anticipated.

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