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The CLASS Gravitational Lens Search

Published online by Cambridge University Press:  26 May 2016

I. W. A. Browne  and
S. T. Myers
I. W. A. Browne
Affiliation:
University of Manchester Jodrell Bank Observatory, SK11 9DL, UK
S. T. Myers
Affiliation:
NRAO, PO Box 0, Socorro, NM, 87801-0387, USA

Abstract

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To exploit gravitational lensing for cosmology large, reliable and statistically complete surveys are required. With the Cosmic Lens All-Sky Survey (CLASS) we have set out to achieve these goals. We pre-select targets to be flat spectrum radio sources and map every source with the VLA at 200mas resolution. Candidates having multiple compact components with flux density ratios ≤10:1 and separation in the range 0.3 to 15 arcsec are followed up with high resolution MERLIN and VLBA observations, eliminating those candidates which do not match strictly defined surface brightness and morphological criteria. A complete sample of 11685 sources have been surveyed and nineteen lens systems have been found.

Type
Part XII: Poster Papers
Information
Symposium - International Astronomical Union , Volume 201: New Cosmological Data and the Values of the Fundamental Parameters , 2005 , pp. 443 - 444
Copyright
Copyright © Astronomical Society of the Pacific 2005 

References

Browne, I. W. A. et al. 2001, AAS Volume 237, P15, Gravitational Lensing: Recent Progress and Future Goals.Google Scholar
Myers, S. et al., 1997, ApJ, 484, 1.CrossRefGoogle Scholar