Photo-z Performance for Precision Cosmology (2009)
Bordoloi, Rongmon, Lilly, Simon J., Amara, Adam
Current and future weak lensing surveys will rely on photometrically estimated redshifts of very large numbers of galaxies. In this paper, we address several different aspects of the demanding...
Berge, Joel, Amara, Adam, Refregier, Alexandre
We compare the efficiency of weak lensing-selected galaxy clusters counts and of the weak lensing bispectrum at capturing non-Gaussian features in the dark matter distribution. We use the halo model...
Results of the GREAT08 Challenge: An image analysis competition for cosmological lensing (2009)
Bridle, Sarah, Balan, Sreekumar T., Bethge, Matthias, Gentile, Marc, Harmeling, Stefan, Heymans, Catherine, ...
We present the results of the GREAT08 Challenge, a blind analysis challenge to infer weak gravitational lensing shear distortions from images. The primary goal was to stimulate new ideas by...
Cloud Cosmology : Building the Web Interface for iCosmo (2009)
Kitching, Thomas, Amara, Adam, Rassat, Anais, Refregier, Alexandre
Astronomy and cosmology have embraced the internet. We routinely and successfully use the internet as a repository for sharing code, publications and information, and as a computational resource....
iCosmo: an Interactive Cosmology Package (2008)
Refregier, Alexandre, Amara, Adam, Kitching, Thomas, Rassat, Anais
iCosmo is a software package to perform interactive cosmological calculations for the low redshift universe. The computation of distance measures, the matter power spectrum, and the growth factor is...
Deconstructing Baryon Acoustic Oscillations: A Comparison of Methods (2008)
Rassat, Anais, Amara, Adam, Amendola, Luca, Castander, Francisco J., Kitching, Thomas, Kunz, Martin, ...
The Baryon Acoustic Oscillations (BAOs) or baryon wiggles which are present in the galaxy power spectrum at scales 100-150Mpc/h are powerful features with which to constrain cosmology. The potential...
Full-Sky Weak Lensing Simulation with 70 Billion Particles (2008)
Teyssier, Romain, Pires, Sandrine, Prunet, Simon, Aubert, Dominique, Pichon, Christophe, Amara, Adam, ...
We have performed a 70 billion dark-matter particles N-body simulation in a 2 $h^{-1}$ Gpc periodic box, using the concordance, cosmological model as favored by the latest WMAP3 results. We have...
Combined analysis of weak lensing and X-ray blind surveys (2008)
Bergé, Joel, Pacaud, Florian, Réfrégier, Alexandre, Massey, Richard, Pierre, Marguerite, Amara, Adam, ...
We present a joint weak lensing and X-ray analysis of 4 deg^2 from the CFHTLS and XMMLSS surveys. Our weak lensing analysis is the first analysis of a real survey using shapelets, a new generation...
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...
Combined analysis of weak lensing and X-ray blind surveys (2007)
Bergé, Joel, Pacaud, Florian, Réfrégier, Alexandre, Massey, Richard, Pierre, Marguerite, Amara, Adam, ...
We present a joint weak lensing and X-ray analysis of 4 deg$^2$ from the CFHTLS and XMM-LSS surveys. Our weak lensing analysis is the first analysis of a real survey using shapelets, a new generation...
Systematic Bias in Cosmic Shear: Beyond the Fisher Matrix (2007)
Amara, Adam, Refregier, Alexandre
We describe a method for computing the biases that systematic signals introduce in parameter estimation using a simple extension of the Fisher matrix formalism. This allows us to calculate the offset...
Optimal Surveys for Weak Lensing Tomography (2006)
Amara, Adam, Refregier, Alexandre
Weak lensing surveys provide a powerful probe of dark energy through the measurement of the mass distribution of the local Universe. A number of ground-based and space-based surveys are being planned...
Smooth Particle Lensing (2006)
Aubert, Dominique, Amara, Adam, Metcalf, R. Benton
We present a numerical technique to compute the gravitational lensing induced by simulated haloes. It relies on a 2D-Tree domain decomposition in the lens plane combined with a description of N-Body...
Simulations of Strong Gravitational Lensing with Substructure (2004)
Amara, Adam, Metcalf, R. Benton, Cox, Thomas J., Ostriker, Jeremiah P.
Galactic sized gravitational lenses are simulated by combining a cosmological N-body simulation and models for the baryonic component of the galaxy. The lens caustics, critical curves, image...