2 code implementations • 3 Jul 2020 • Benjamin Giblin, Catherine Heymans, Marika Asgari, Hendrik Hildebrandt, Henk Hoekstra, Benjamin Joachimi, Arun Kannawadi, Konrad Kuijken, Chieh-An Lin, Lance Miller, Tilman Tröster, Jan Luca van den Busch, Angus H. Wright, Maciej Bilicki, Chris Blake, Jelte de Jong, Andrej Dvornik, Thomas Erben, Fedor Getman, Nicola R. Napolitano, Peter Schneider, HuanYuan Shan
We present weak lensing shear catalogues from the fourth data release of the Kilo-Degree Survey, KiDS-1000, spanning 1006 square degrees of deep and high-resolution imaging.
Cosmology and Nongalactic Astrophysics
no code implementations • 13 Dec 2017 • Olivier Wertz, Bastian Orthen, Peter Schneider
In this paper, we assess to what extent the source position transformation (SPT), a more general invariance transformation which contains the MST as a special case, may affect the time delays predicted by a model.
Cosmology and Nongalactic Astrophysics
1 code implementation • 20 Jul 2017 • Shahab Joudaki, Chris Blake, Andrew Johnson, Alexandra Amon, Marika Asgari, Ami Choi, Thomas Erben, Karl Glazebrook, Joachim Harnois-Deraps, Catherine Heymans, Hendrik Hildebrandt, Henk Hoekstra, Dominik Klaes, Konrad Kuijken, Chris Lidman, Alexander Mead, Lance Miller, David Parkinson, Gregory B. Poole, Peter Schneider, Massimo Viola, Christian Wolf
The complementarity of our observables allows for constraints on modified gravity degrees of freedom that are not simultaneously bounded with either probe alone, and up to a factor of three improvement in the $S_8$ constraint in the extended cosmology compared to KiDS alone.
Cosmology and Nongalactic Astrophysics
no code implementations • 14 Jun 2016 • Sandra Unruh, Peter Schneider, Dominique Sluse
The deflection field $\boldsymbol{\hat{\alpha}}(\boldsymbol{\theta})$ resulting from an SPT is not curl-free in general, and thus not a deflection that can be obtained from a lensing mass distribution.
Cosmology and Nongalactic Astrophysics
no code implementations • 14 Mar 2016 • Peter Schneider
We derive a new relation between cosological distances, valid in any (statistically) isotropic space-time and independent of cosmological parameters or even the validity of the field equation of General Relativity.
Cosmology and Nongalactic Astrophysics
no code implementations • 19 Jun 2013 • Peter Schneider, Dominique Sluse
The main obstacle for gravitational lensing to determine accurate masses of deflectors, or to determine precise estimates for the Hubble constant, is the degeneracy of lensing observables with respect to the mass-sheet transformation (MST).
Cosmology and Nongalactic Astrophysics
