1k citations · 6.2k across the 67 of their papers we have counts for
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CARS: the CFHTLS-Archive-Research Survey; I. Five-band multi-colour data from 37 sq. deg. CFHTLS-Wide observations
T. Erben, H. Hildebrandt, M. Lerchster +10
We present the CFHTLS-Archive-Research Survey (CARS). It is a virtual multi-colour survey based on public archive images from the CFHT-Legacy-Survey. Our main scientific interests…
Sources of contamination to weak lensing three-point statistics: constraints from N-body simulations
Elisabetta Semboloni, Catherine Heymans, Ludovic van Waerbeke +1
We investigate the impact of the observed correlation between a galaxies shape and its surrounding density field on the measurement of third order weak lensing shear statistics. Us…
Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -II. Application to Simulations
T. D. Kitching, L. Miller, C. E. Heymans +2
We extend the Bayesian model fitting shape measurement method presented in Miller et al. (2007) and use the method to estimate the shear from the Shear TEsting Programme simulation…
First catalog of strong lens candidates in the COSMOS field
Cecile Faure, Jean-Paul Kneib, Giovanni Covone +19
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 m…
Handbook for the GREAT08 Challenge: An image analysis competition for cosmological lensing
Sarah Bridle, John Shawe-Taylor, Adam Amara +35
The GRavitational lEnsing Accuracy Testing 2008 (GREAT08) Challenge focuses on a problem that is of crucial importance for future observations in cosmology. The shapes of distant g…
The dark matter environment of the Abell 901/902 supercluster: a weak lensing analysis of the HST STAGES survey
Catherine Heymans, Meghan E. Gray, Chien Y. Peng +21
We present a high resolution dark matter reconstruction of the z=0.165 Abell 901/902 supercluster from a weak lensing analysis of the HST STAGES survey. We detect the four main str…
Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -I. Methodology and a Fast Fitting Algorithm
L. Miller, T. D. Kitching, C. Heymans +2
The principles of measuring the shapes of galaxies by a model-fitting approach are discussed in the context of shape-measurement for surveys of weak gravitational lensing. It is ar…
The SCUBA-2 "All-Sky" Survey
M. A. Thompson, S. Serjeant, T. Jenness +45
The sub-millimetre wavelength regime is perhaps the most poorly explored over large areas of the sky, despite the considerable effort that has been expended in making deep maps ove…
Weak Gravitational Lensing with COSMOS: Galaxy Selection and Shape Measurements
A. Leauthaud, R. Massey, J. P. Kneib +14
With a primary goal of conducting precision weak lensing measurements from space, the COSMOS survey has imaged the largest contiguous area observed by the Hubble Space Telescope (H…
LeMoMaF: Lensed Mock Map Facility
Jaime E. Forero-Romero, Jeremy Blaizot, Julien Devriendt +2
We present the Lensed Mock Map Facility (LeMoMaF), a tool designed to perform mock weak lensing measurements on numerically simulated chunks of the universe. Coupling N-body simula…
The Shear TEsting Programme 2: Factors affecting high precision weak lensing analyses
Richard Massey, Catherine Heymans, Joel Berge +28
The Shear TEsting Programme (STEP) is a collaborative project to improve the accuracy and reliability of weak lensing measurement, in preparation for the next generation of wide-fi…
Cosmic variance of weak lensing surveys in the non-Gaussian regime
Elisabetta Semboloni, Ludovic van Waerbeke, Catherine Heymans +4
The results from weak gravitational lensing analyses are subject to a cosmic variance error term that has previously been estimated assuming Gaussian statistics. In this letter we…
Potential sources of contamination to weak lensing measurements: constraints from N-body simulations
Catherine Heymans, Martin White, Alan Heavens +2
We investigate the expected correlation between the weak gravitational shear of distant galaxies and the orientation of foreground galaxies, through the use of numerical simulation…
Tracking quintessence by cosmic shear - Constraints from VIRMOS-Descart and CFHTLS and future prospects
Carlo Schimd, Ismael Tereno, Jean-Philippe Uzan +6
Dark energy can be investigated in two complementary ways, by considering either general parameterizations or physically well-defined models. Following the second route, we explore…
Redshift and Shear Calibration: Impact on Cosmic Shear Studies and Survey Design
Ludovic Van Waerbeke, Martin White, Henk Hoekstra +1
The cosmological interpretation of weak lensing by large-scale structures requires knowledge of the redshift distribution of the source galaxies. Current lensing surveys are often…
First cosmic shear results from the Canada-France-Hawaii Telescope Wide Synoptic Legacy Survey
H. Hoekstra, Y. Mellier, L. van Waerbeke +6
We present the first measurements of the weak gravitational lensing signal induced by the large scale mass distribution from data obtained as part of the ongoing Canada-France-Hawa…
The Shear TEsting Programme 1: Weak lensing analysis of simulated ground-based observations
Catherine Heymans, Ludovic Van Waerbeke, David Bacon +22
The Shear TEsting Programme, STEP, is a collaborative project to improve the accuracy and reliability of all weak lensing measurements in preparation for the next generation of wid…
Dealing with systematics in cosmic shear studies: new results from the VIRMOS-Descart Survey
L. Van Waerbeke, Y. Mellier, H. Hoekstra
We present a reanalysis of the VIRMOS-Descart weak lensing data, with a particular focus on different corrections for the variation of the point spread function anisotropy (PSF) ac…
Joint cosmological parameters forecast from CFHTLS-cosmic shear and CMB data
I. Tereno, O. Doré, L. van Waerbeke +1
We present a prospective analysis of a combined cosmic shear and cosmic microwave background data set, focusing on a Canada France Hawaii Telescope Legacy Survey (CFHTLS) type lens…
Constraining Dark Energy Evolution with Gravitational Lensing by Large Scale Structures
Karim Benabed, Ludovic Van Waerbeke
We study the sensitivity of weak lensing by large scale structures to the evolution of dark energy. We explore a 2-parameters model of dark energy evolution, inspired by tracking q…
The three dimensional power spectrum of dark and luminous matter from the VIRMOS-DESCART cosmic shear survey
Ue-Li Pen, Tingting Lu, Ludovic van Waerbeke +1
We present the first optimal power spectrum estimation and three dimensional deprojections for the dark and luminous matter and their cross correlations. The results are obtained u…
Cosmic Shear Review
L. Van Waerbeke, I. Tereno, Y. Mellier +1
We present an overview of the cosmic shear results obtained so far. We focus on the 2-point statistics only. Evidences supporting the cosmological origin of the measured signal are…
Cosmic Shear: The Dark Side of the Universe
L. Van Waerbeke, Y. Mellier, I. Tereno
We discuss the present status and future prospects for cosmic shear observations and their cosmological constraints. We review the evidences supporting the cosmological origin of t…
Tracing Matter with Weak Lensing Surveys
Y. Mellier, L. van Waerbeke
Gravitational weak lensing maps the location of (dark) matter at all scales. The lens-induced distortion field traces gravity fields and can be used to reconstruct the mass distrib…