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相关论文: The CFHTLS Strong Lensing Legacy Survey: I. Survey…

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We present the Strong Lensing Legacy Survey - ARCS (SARCS) sample compiled from the final T0006 data release of the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) covering a total non-overlapping area of 159 sq.deg. We adopt a…

宇宙学与河外天体物理 · 物理学 2015-05-30 Anupreeta More , Remi Cabanac , Surhud More , Christophe Alard , Marceau Limousin , Jean-Paul Kneib , Raphael Gavazzi , Veronica Motta

[ABRIDGED] The new generation of wide field optical imaging like the Canada France Hawaii Telescope Legacy Survey (CFHTLS) enables discoveries of all types of gravitational lenses present in the sky. The Strong Lensing Legacy Survey (SL2S)…

宇宙学与河外天体物理 · 物理学 2015-05-18 Jean-Francois Sygnet , Hong Tu , Bernard Fort , Raphael Gavazzi

We present the weak lensing and optical analysis of the SL2S-ARCS (SARCS) sample of strong lens candidates. The sample is based on the Strong Lensing Legacy Survey (SL2S), a systematic search of strong lensing systems in the photometric…

宇宙学与河外天体物理 · 物理学 2015-06-17 G. Foëx , V. Motta , M. Limousin , T. Verdugo , A. More , R. Cabanac , R. Gavazzi , R. P. Muñoz

We present the first weak gravitational lensing analysis of the completed Canada-France-Hawaii Telescope Legacy Survey (CFHTLS). We study the 64 square degrees W1 field, the largest of the CFHTLS-Wide survey fields, and present the largest…

We report modelling follow-up of recently-discovered gravitational-lens candidates in the Canada France Hawaii Telescope Legacy Survey. Lens modelling was done by a small group of specially-interested volunteers from the SpaceWarps…

We present Hubble Space Telescope (HST) imaging data and CFHT Near IR ground-based images for the final sample of 56 candidate galaxy-scale lenses uncovered in the CFHT Legacy Survey as part of the Strong Lensing in the Legacy Survey (SL2S)…

宇宙学与河外天体物理 · 物理学 2015-06-16 Alessandro Sonnenfeld , Raphaël Gavazzi , Sherry H. Suyu , Tommaso Treu , Philip J. Marshall

[Abridged] We exploit the clustering of massive galaxies to perform a high efficiency imaging search for gravitational lenses. Our dataset comprises 44 fields imaged by the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS),…

天体物理学 · 物理学 2010-05-12 Elisabeth R. Newton , Philip J. Marshall , Tommaso Treu

We train and apply convolutional neural networks, a machine learning technique developed to learn from and classify image data, to Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) imaging for the identification of potential strong…

天体物理仪器与方法 · 物理学 2017-06-16 Colin Jacobs , Karl Glazebrook , Thomas Collett , Anupreeta More , Christopher McCarthy

We report on the first results of an imaging survey to detect strong gravitational lensing targeting the richest clusters selected from the photometric data of the Sloan Digital Sky Survey (SDSS) with follow-up deep imaging observations…

We present the first catalog of 67 strong galaxy-galaxy lens candidates discovered in the 1.64 square degree Hubble Space Telescope COSMOS survey. Twenty of these systems display multiple images or strongly curved large arcs. Our initial…

Strong gravitational lensing is a powerful tool for investigating dark matter and dark energy properties. With the advent of large-scale sky surveys, we can discover strong lensing systems on an unprecedented scale, which requires efficient…

We present the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS) that accurately determines a weak gravitational lensing signal from the full 154 square degrees of deep multi-colour data obtained by the CFHT Legacy Survey. Weak…

We report the results of $EasyCritics$, a fully automated algorithm for the efficient search of strong-lensing (SL) regions in wide-field surveys, applied to the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS). By using only the…

宇宙学与河外天体物理 · 物理学 2018-07-12 M. Carrasco , S. Stapelberg , M. Maturi , M. Bartelmann , G. Seidel , T. Erben

We study the relative alignment of mass and light in a sample of 16 massive early-type galaxies at z=0.2-0.9 that act as strong gravitational lenses. The sample was identified from deep multi-band images obtained as part of the Canada…

宇宙学与河外天体物理 · 物理学 2015-06-04 Raphael Gavazzi , Tommaso Treu , Philip J. Marshall , Florence Brault , Andrea Ruff

We present VLT spectroscopic observations of 7 discovered galaxy groups between 0.3<z<0.7. The groups were selected from the Strong Lensing Legacy Survey (SL2S), a survey that consists in a systematic search for strong lensing systems in…

宇宙学与河外天体物理 · 物理学 2015-06-12 R. P. Muñoz , V. Motta , T. Verdugo , F. Garrido , M. Limousin , N. Padilla , G. Foëx , R. Cabanac , R. Gavazzi , L. F. Barrientos , J. Richard

We present the definitive data for the full sample of 131 strong gravitational lens candidates observed with the Advanced Camera for Surveys (ACS) aboard the Hubble Space Telescope by the Sloan Lens ACS (SLACS) Survey. All targets were…

The Sloan Lens ACS (SLACS) Survey is an efficient Hubble Space Telescope Snapshot imaging survey for new galaxy-scale strong gravitational lenses. The targeted lens candidates are selected spectroscopically from within the Sloan Digital Sky…

天体物理学 · 物理学 2010-11-11 Adam S. Bolton , Scott Burles , Leon V. E. Koopmans , Tommaso Treu , Leonidas A. Moustakas

The Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) represents the most powerful weak lensing survey carried out to date. The CFHTLenS (Canada-France-Hawaii Telescope Lensing Survey) team was formed in 2008 to analyse the data from…

宇宙学与河外天体物理 · 物理学 2019-08-13 Hendrik Hildebrandt

We report the discovery of 29 promising (and 59 total) new lens candidates from the CFHT Legacy Survey (CFHTLS) based on about 11 million classifications performed by citizen scientists as part of the first Space Warps lens search. The goal…

The existence of strong lensing systems with Einstein radii (Re) covering the full mass spectrum, from ~1-2" (produced by galaxy scale dark matter haloes) to >10" (produced by galaxy cluster scale haloes) have long been predicted. Many…

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