Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.282...67k&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. Vol. 282, No. 1, p. 67 - 76
Astronomy and Astrophysics
Astronomy
33
Gravitational Lensing, Quasars: Gravitational Lenses, Gravitational Lenses: Surveys
Scientific paper
The authors discuss the biases and selection effects relevant to the Jodrell Bank-VLA gravitational lens survey (JVAS). They 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 this 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.
Browne Ian W. A.
King Lindsay J.
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