J
Joel Bergé
Researcher at Université Paris-Saclay
Publications - 58
Citations - 3340
Joel Bergé is an academic researcher from Université Paris-Saclay. The author has contributed to research in topics: Weak gravitational lensing & Dark matter. The author has an hindex of 19, co-authored 50 publications receiving 2918 citations. Previous affiliations of Joel Bergé include California Institute of Technology & Paris Diderot University.
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Journal ArticleDOI
The Shear Testing Programme – I. Weak lensing analysis of simulated ground-based observations
Catherine Heymans,Ludovic Van Waerbeke,D. J. Bacon,Joel Bergé,Gary Bernstein,Emmanuel Bertin,Sarah Bridle,Michael L. Brown,Douglas Clowe,H. Dahle,Thomas Erben,Meghan E. Gray,M. Hetterscheidt,Henk Hoekstra,P. Hudelot,Mike Jarvis,Konrad Kuijken,Vera Margoniner,Richard Massey,Yannick Mellier,R. Nakajima,Alexandre Refregier,Jason Rhodes,Tim Schrabback,David Wittman +24 more
TL;DR: 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 wide-field surveys as discussed by the authors.
Journal ArticleDOI
The Shear TEsting Programme 1: Weak lensing analysis of simulated ground-based observations
Catherine Heymans,Ludovic Van Waerbeke,David Bacon,Joel Bergé,Gary Bernstein,Emmanuel Bertin,Sarah Bridle,Michael L. Brown,Douglas Clowe,H. Dahle,Thomas Erben,Meghan E. Gray,M. Hetterscheidt,Henk Hoekstra,P. Hudelot,Mike Jarvis,Konrad Kuijken,Vera Margoniner,Richard Massey,Yannick Mellier,Reiko Nakajima,Alexandre Refregier,Jason Rhodes,Tim Schrabback,David Wittman +24 more
TL;DR: In this article, a blind analysis of simulated ground-based observations of relatively simple galaxy morphologies is presented, and the most successful methods are shown to achieve percent level accuracy of better than 7%.
Journal ArticleDOI
The Shear TEsting Programme 2: Factors affecting high precision weak lensing analyses
Richard Massey,Catherine Heymans,Joel Bergé,Gary Bernstein,Sarah Bridle,Douglas Clowe,Håkon Dahle,Richard S. Ellis,Thomas Erben,M. Hetterscheidt,F. William High,F. William High,Christopher M. Hirata,Henk Hoekstra,P. Hudelot,Mike Jarvis,David Johnston,Konrad Kuijken,Vera Margoniner,Rachel Mandelbaum,Yannick Mellier,Reiko Nakajima,Stephane Paulin-Henriksson,Molly S. Peeples,Molly S. Peeples,Chris Roat,Alexandre Refregier,Jason Rhodes,Jason Rhodes,Tim Schrabback,Mischa Schirmer,Uroš Seljak,Elisabetta Semboloni,Elisabetta Semboloni,Ludovic Van Waerbeke +34 more
TL;DR: In this paper, the authors present a review of current and emerging shear-measurement methods in a common language, and assess their performance by running them (blindly) on simulated images that contain a known shear signal.
Journal ArticleDOI
MICROSCOPE Mission: First Results of a Space Test of the Equivalence Principle.
Pierre Touboul,Gilles Métris,Manuel Rodrigues,Yves André,Quentin Baghi,Joel Bergé,Damien Boulanger,Stefanie Bremer,Patrice Carle,Ratana Chhun,Bruno Christophe,Valerio Cipolla,Thibault Damour,Pascale Danto,Hansjoerg Dittus,Pierre Fayet,Bernard Foulon,Claude Gageant,Pierre-Yves Guidotti,Daniel Hagedorn,Emilie Hardy,Phuong-Anh Huynh,Henri Inchauspe,Patrick Kayser,Stéphanie Lala,Claus Lämmerzahl,Vincent Lebat,Pierre Leseur,Françoise Liorzou,Meike List,Frank Löffler,Isabelle Panet,Benjamin Pouilloux,Pascal Prieur,Alexandre Rebray,Serge Reynaud,Benny Rievers,Alain Robert,Hanns Selig,Laura Serron,T. J. Sumner,Nicolas Tanguy,Pieter Visser +42 more
TL;DR: The MICROSCOPE satellite aims to test its validity at the 10^{-15} precision level, by measuring the force required to maintain two test masses exactly in the same orbit, by characterizing the relative difference in their free-fall accelerations.
Journal ArticleDOI
COSMOS: Three-dimensional Weak Lensing and the Growth of Structure*
Richard Massey,Jason Rhodes,Jason Rhodes,Alexie Leauthaud,Peter Capak,Richard S. Ellis,Anton M. Koekemoer,Alexandre Refregier,Nick Scoville,James E. Taylor,James E. Taylor,Justin Albert,Joel Bergé,Catherine Heymans,David Johnston,Jean-Paul Kneib,Yannick Mellier,Bahram Mobasher,Elisabetta Semboloni,Patrick L. Shopbell,Lidia Tasca,Ludovic Van Waerbeke +21 more
TL;DR: In this paper, a 3D analysis of the Hubble Space Telescope COSMOS survey is presented, showing that σ_8(Ω_m/0.3)^(0.44) = 0.866^(+0.085)_(-0.068) at 68% confidence limits, including both statistical and potential systematic sources of error.