KiDS-1000 cosmic shear reanalysis using MetaCalibration

Astronomy and Astrophysics 2026 Open access

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Authors: Mijin Yoon, Henk Hoekstra, Shangrong Li, Konrad Kuijken, L. Miller, Hendrik Hildebrandt, Catherine Heymans, Benjamin Joachimi, Angus H. Wright, Marika Asgari, Jan Luca van den Busch, Robert Reischke
+1 more Benjamin Stölzner
DOI: 10.1051/0004-6361/202557694
Cited by: 0
References: 109

Abstract

A number of cosmic shear studies have reported results that are in mild tension with Planck cosmic microwave background measurements. To explore if this can be caused by biases in shear estimation, we revisit data analyses from the Kilo-Degree Survey (KiDS) using an alternative shape measurement pipeline that is more robust to uncertainties in the calibration. To this end, we present an implementation of =0.789_ and compare its performance to that of łensfit, which has been used in previous data analyses. We find that the multiplicative bias is reduced, in particular for the most distant redshifts, as derived from multi-band image simulations designed to match the KiDS data. For all tomographic bins, we obtain a multiplicative bias $|m|

Fields of Study & Subjects

Astronomy and Astrophysical Research Geophysics and Gravity Measurements Scientific Research and Discoveries

Publication details

Journal / source
Astronomy and Astrophysics
Publisher
EDP Sciences
Volume
715
Pages
A11
Publication date
14 September 2026
Language
EN