Biases, selection effects and image multiplicities in the Jodrell Bank-VLA gravitational lens survey

Lindsay J. King, Ian W A Browne

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In this paper we discuss the biases and selection effects relevant to the Jodrell Bank- VLA gravitational lens survey (JVAS). We present a method for the determination of the magnification bias and apply this to the luminosity function of the flat-spectrum radio source population. The magnification bias in our survey is lower than in optical surveys, as expected qualitatively from the steeper optical luminosity function slopes. The theoretical predictions for the number of sources of each multiplicity, which are based on lenses modelled as isothermal potentials with external shear, are compared with the findings of the survey; five-image events are detected more frequently than expected.
    Original languageEnglish
    Pages (from-to)67-76
    Number of pages9
    JournalMonthly Notices of the Royal Astronomical Society
    Volume282
    Issue number1
    Publication statusPublished - 1996

    Keywords

    • Gravitational lensing

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