Schrabback, Tim, Hartlap, Jan, Joachimi, Benjamin, Kilbinger, Martin, Simon, Patrick, Benabed, Karim, ...
We present a tomographic cosmological weak lensing analysis of the HST COSMOS Survey. Applying our lensing-optimized data reduction, principal component interpolation for the ACS PSF, and improved...
Semboloni, Elisabetta, Tereno, Ismael, Van Waerbeke, Ludovic, Heymans, Catherine
The current methods available to estimate gravitational shear from astronomical images of galaxies introduce systematic errors which can affect the accuracy of weak lensing cosmological constraints....
Semboloni, Elisabetta, Heymans, Catherine, Van Waerbeke, Ludovic, Schneider, Peter
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. Using numerical...
Handbook for the GREAT08 Challenge: An image analysis competition for cosmological lensing (2008)
Bridle, Sarah, Shawe-Taylor, John, Amara, Adam, Applegate, Douglas, Balan, Sreekumar T., Berge, Joel, ...
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 galaxies can be used...
Cosmological Constraints From the 100 Square Degree Weak Lensing Survey (2007)
Benjamin, Jonathan, Heymans, Catherine, Semboloni, Elisabetta, Van Waerbeke, Ludovic, Hoekstra, Henk, Erben, Thomas, ...
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 degrees, with a...
COSMOS: 3D weak lensing and the growth of structure (2007)
Massey, Richard, Rhodes, Jason, Leauthaud, Alexie, Capak, Peter, Ellis, Richard, Koekemoer, Anton, ...
We present a three dimensional cosmic shear analysis of the Hubble Space Telescope COSMOS survey, the largest ever optical imaging program performed in space. We have measured the shapes of galaxies...
COSMOS: 3D weak lensing and the growth of structure (2007)
Massey, Richard, Rhodes, Jason, Leauthaud, Alexie, Capak, Peter, Ellis, Richard, Koekemoer, Anton, ...
We present a three dimensional cosmic shear analysis of the Hubble Space Telescope COSMOS survey, the largest ever optical imaging program performed in space. We have measured the shapes of galaxies...
Mesure et interpretation du cisaillement cosmologique (2006)
L'analyse du cisaillement cosmologique est aujourd'hui un puissant moyen d'étude des propriétés du spectre de la matière noire. On a aussi montré que l'approche tomographique permet de...
The Shear TEsting Programme 2: Factors affecting high precision weak lensing analyses (2006)
Massey, Richard, Heymans, Catherine, Berge, Joel, Bernstein, Gary, Bridle, Sarah, Clowe, Douglas, ...
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-field surveys. We...
Cosmic variance of weak lensing surveys in the non-Gaussian regime (2006)
Semboloni, Elisabetta, Van Waerbeke, Ludovic, Heymans, Catherine, Hamana, Takashi, Colombi, Stephane, White, Martin, ...
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 address the issue...
Schimd, Carlo, Tereno, Ismael, Uzan, Jean-Philippe, Mellier, Yannick, Van Waerbeke, Ludovic, Semboloni, Elisabetta, ...
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 the constraints on...
Mesure et interpretation du cisaillement cosmologique (2006)
L'analyse du cisaillement cosmologique est aujourd'hui un puissant moyen d'étude des propriétés du spectre de la matière noire. On a aussi montré que l'approche tomographique permet de...
Mesure et interpretation du cisaillement cosmologique (2006)
L'analyse du cisaillement cosmologique est aujourd'hui un puissant moyen d'étude des propriétés du spectre de la matière noire. On a aussi montré que l'approche tomographique permet de...
Mesure et interpretation du cisaillement cosmologique (2006)
L'analyse du cisaillement cosmologique est aujourd'hui un puissant moyen d'étude des propriétés du spectre de la matière noire. On a aussi montré que l'approche tomographique permet de...