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Very weak lensing in the CFHTLS Wide: Cosmology from cosmic shear in the linear regime
L. Fu, E. Semboloni, H. Hoekstra +16
We present an exploration of weak lensing by large-scale structure in the linear regime, using the third-year (T0003) CFHTLS Wide data release. Our results place tight constraints…
Realistic simulations of gravitational lensing by galaxy clusters: extracting arc parameters from mock DUNE images
Massimo Meneghetti, Peter Melchior, Andrea Grazian +6
We present a newly developed code that allows simulations of optical observations of galaxy fields with a variety of instruments. The code incorporates gravitational lensing effect…
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…
GEMS: Galaxy fitting catalogues and testing parametric galaxy fitting codes
Boris Häußler, Daniel H. McIntosh, Marco Barden +14
In the context of measuring structure and morphology of intermediate redshift galaxies with recent HST/ACS surveys, we tune, test, and compare two widely used fitting codes (GALFIT…
Cosmological Constraints From the 100 Square Degree Weak Lensing Survey
Jonathan Benjamin, Catherine Heymans, Elisabetta Semboloni +7
We present a cosmic shear analysis of the 100 square degree weak lensing survey, combining data from the CFHTLS-Wide, RCS, VIRMOS-DESCART and GaBoDS surveys. Spanning ~100 square d…
The Stability of the Point Spread Function of the Advanced Camera for Surveys on the Hubble Space Telescope and Implications for Weak Gravitational Lensing
Jason D. Rhodes, Richard Massey, Justin Albert +11
(abridged) We examine the spatial and temporal stability of the HST ACS Wide Field Camera (WFC) point spread function (PSF) using the two square degree COSMOS survey. We show that…