{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/kids-1000-catalogue-weak-gravitational","title":"KiDS-1000 catalogue: Weak gravitational lensing shear measurements","arxiv_id":"2007.01845","date":"2020-07-03","proceeding":null,"authors":["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"],"abstract":"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. Our `gold-sample' of galaxies, with well-calibrated photometric redshift distributions, consists of 21 million galaxies with an effective number density of $6.17$ galaxies per square arcminute. We quantify the accuracy of the spatial, temporal, and flux-dependent point-spread function (PSF) model, verifying that the model meets our requirements to induce less than a $0.1\\sigma$ change in the inferred cosmic shear constraints on the clustering cosmological parameter $S_8 = \\sigma_8\\sqrt{\\Omega_{\\rm m}/0.3}$. Through a series of two-point null-tests, we validate the shear estimates, finding no evidence for significant non-lensing B-mode distortions in the data. The PSF residuals are detected in the highest-redshift bins, originating from object selection and/or weight bias. The amplitude is, however, shown to be sufficiently low and within our stringent requirements. With a shear-ratio null-test, we verify the expected redshift scaling of the galaxy-galaxy lensing signal around luminous red galaxies. We conclude that the joint KiDS-1000 shear and photometric redshift calibration is sufficiently robust for combined-probe gravitational lensing and spectroscopic clustering analyses.","url_abs":"https://arxiv.org/abs/2007.01845v2","url_pdf":"https://arxiv.org/pdf/2007.01845v2.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"kids-1000-catalogue-weak-gravitational","repo_url":"https://github.com/kids-wl/cat_to_obs_k1000_p1","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":{"status":"ok","spdx":"MIT"}},{"paper_slug":"kids-1000-catalogue-weak-gravitational","repo_url":"https://github.com/linc-tw/salmo","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":{"status":"ok","spdx":"GPL-3.0"}}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}