Galaxy-scale lenses in the Kilo-Degree Survey Virtual Observatory Resource

Authors
  1. Petrillo C.E.
  2. Tortora C.
  3. Vernardos G.
  4. Koopmans L.V.E.,Verdoes Kleijn G.
  5. Bilicki M.
  6. Napolitano N.R.
  7. Chatterjee S.
  8. Covone G.,Dvornik A.
  9. Erben T.
  10. Getman F.
  11. Giblin B.
  12. Heymans C.
  13. de Jong J.T.A.,Kuijken K.
  14. Schneider P.
  15. Shan H.
  16. Spiniello C.
  17. Wright A.H.
  18. Published by
    CDS
Abstract

We present a new sample of galaxy-scale strong gravitational lens candidates, selected from 904deg^2^ of Data Release 4 of the Kilo-Degree Survey, i.e. the 'Lenses in the Kilo-Degree Survey' (LinKS) sample. We apply two convolutional neural networks (ConvNets) to ~88000 colour-magnitude-selected luminous red galaxies yielding a list of 3500 strong lens candidates. This list is further downselected via human inspection. The resulting LinKS sample is composed of 1983 rank-ordered targets classified as 'potential lens candidates' by at least one inspector. Of these, a high-grade subsample of 89 targets is identified with potential strong lenses by all inspectors. Additionally, we present a collection of another 200 strong lens candidates discovered serendipitously from various previous ConvNet runs. A straightforward application of our procedure to future Euclid or Large Synoptic Survey Telescope data can select a sample of ~3000 lens candidates with less than 10 per cent expected false positives and requiring minimal human intervention.

Keywords
  1. gravitational-lensing
  2. galaxies
  3. astrometry
Bibliographic source Bibcode
2019MNRAS.484.3879P
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/484/3879
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/484/3879
Document Object Identifer DOI
doi:10.26093/cds/vizier.74843879

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History

2022-10-10T12:49:14Z
Resource record created
2022-10-10T12:49:14Z
Created
2024-08-19T20:16:45Z
Updated

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
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cds-question@unistra.fr