Details

Autor(en) / Beteiligte

• Gavazzi, Raphael
• Marshall, Philip J
• Treu, Tommaso
• Sonnenfeld, Alessandro

Titel

RINGFINDER: AUTOMATED DETECTION OF GALAXY-SCALE GRAVITATIONAL LENSES IN GROUND-BASED MULTI-FILTER IMAGING DATA

Ist Teil von

• The Astrophysical journal, 2014-04, Vol.785 (2), p.1-14

Ort / Verlag

United States: American Astronomical Society

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Electronic Journals Library

Beschreibungen/Notizen

• We present RingFinder, a tool for finding galaxy-scale strong gravitational lenses in multi-band imaging data. RingFinder detects the presence of blue residuals embedded in an otherwise smooth red light distribution by difference imaging in two bands. The method is automated for efficient application to current and future surveys, having originally been designed for the 150 deg super(2) Canada-France-Hawaii Telescope Legacy Survey (CFHTLS). We describe each of the steps of RingFinder. RingFinder does not introduce any significant bias in the source or deflector population. We conclude by presenting the final catalog of RingFinder CFHTLS galaxy-scale strong lens candidates. From an initial sample of 640,000 ETGs, RingFinder returns 2500 candidates, which we further reduce by visual inspection to 330 candidates. We confirm 33 new gravitational lenses from the main sample of candidates, plus an additional 16 systems taken from earlier versions of RINGFINDER. First applications are presented in the Strong Lensing Legacy Survey galaxy-scale lens sample paper series.