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  1. No Access

    Chapter and Conference Paper

    The JVAS/Class Gravitational Lens Surveys

    The JVAS/CLASS surveys are designed to find gravitational lens systems in which the flat spectrum cores of radio sources are multiply imaged. The prime motivation for the searches is to find systems from which...

    I. W.A. Browne, N. J. Jackson, P. Augusto, D. R. Henstock… in Observational Cosmology (1998)

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    Chapter

    A Search for Gravitational Milli-Lenses

    We have searched for gravitational milli-lens systems by examining VLBI maps of ∼ 300 flat-spectrum radio sources. So far we have followed up 7 candidates, with separations in the range 2–20 mas. None have bee...

    P. N. Wilkinson, D. R. Henstock… in Examining the Big Bang and Diffuse Backgro… (1996)

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    Chapter and Conference Paper

    The Caltech—Jodrell Bank (CJ) Vlbi Snapshot Surveys

    Two large VLBI surveys are currently underway which utilise the snapshot technique pioneered on the VLA. With a 12-16 telescope array three ∼ 20 min snapshots are sufficient to make excellent hybrid maps. Rece...

    P. N. Wilkinson, A. Polatidis, D. R. Henstock… in Very High Angular Resolution Imaging (1994)