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The 2dF Gravitational Lens Survey

Published online by Cambridge University Press:  05 March 2013

Daniel J. Mortlock ,
Darren S. Madgwick  and
Ofer Lahav
Daniel J. Mortlock
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, United Kingdom; [email protected] Astrophysics Group, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, United Kingdom
Darren S. Madgwick
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, United Kingdom; [email protected]
Ofer Lahav
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, United Kingdom; [email protected]
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Abstract

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The 2 degree Field (2dF) galaxy redshift survey will involve obtaining spectra of approximately 2.5 105 objects which have previously been identified as galaxy candidates on morphological grounds. Included in these spectra should be about ten gravitationally-lensed quasars, all with low-redshift galaxies as deflectors (as the more common lenses with high-redshift deflectors will be rejected from the survey as multiple point-sources). The lenses will appear as superpositions of galaxy and quasar spectra, and either cross-correlation techniques or principal components analysis should be able to identify candidates systematically. With the 2dF survey approximately half-completed it is now viable to begin a methodical search for these spectroscopic lenses, and the first steps of this project are described here.

Keywords

surveysgravitational lensingmethods: data analysis
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 18 , Issue 2 , 2001 , pp. 192 - 194
Copyright
Copyright © Astronomical Society of Australia 2001

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