Статья

Gravitational lensing analysis of the Kilo-Degree Survey

Konrad KuijkenLeiden Observatory Leiden UniversityCatherine HeymansScottish Universities Physics Alliance, Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UKH. HildebrandtArgelander-Institute for Astronomy, University of Bonn, Auf dem Hügel 71, D-53121 Bonn, GermanyReiko NakajimaArgelander-Institute for Astronomy, University of Bonn, Auf dem Hügel 71, D-53121 Bonn, GermanyT. ErbenArgelander-Institute for Astronomy, University of Bonn, Auf dem Hügel 71, D-53121 Bonn, GermanyJ. T. A. de JongLeiden Observatory Leiden UniversityMassimo ViolaLeiden Observatory Leiden UniversityAmi ChoiScottish Universities Physics Alliance, Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UKHenk HoekstraLeiden Observatory Leiden UniversityL. MillerAstrophysics, Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH, UKEdo van UitertArgelander Institute for Astronomy, University of Bonn, Auf dem Hügel 71, D-53121 Bonn, GermanyA. AmonScottish Universities Physics Alliance, Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UKChris BlakeCentre for Astrophysics & Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, AustraliaMargot M. BrouwerLeiden Observatory Leiden UniversityAxel BuddendiekArgelander-Institute for Astronomy, University of Bonn, Auf dem Hügel 71, D-53121 Bonn, GermanyIan Fenech ContiInstitute of Space Sciences and Astronomy (ISSA), University of Malta, Msida MSD 2080, MaltaMartin EriksenLeiden Observatory Leiden UniversityA. GradoINAF - Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, ItalyJoachim Harnois-DérapsDepartment of Physics and Astronomy , University of British Columbia , 6224 Agricultural Road, Vancouver, BC V6T 1Z1, CanadaEwout HelmichLeiden Observatory Leiden UniversityRicardo HerbonnetLeiden Observatory Leiden UniversityN. IrisarriLeiden Observatory Leiden UniversityThomas KitchingMullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking Surrey RH5 6NTDominik KlaesArgelander-Institute for Astronomy, University of Bonn, Auf dem Hügel 71, D-53121 Bonn, GermanyF. La BarberaINAF - Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, ItalyN. R. NapolitanoINAF - Osservatorio Astronomico di Capodimonte, Via Moiariello 16, 80131 Napoli, ItalyM. RadovichINAF – Osservatorio Astronomico di Padova, via dell’Osservatorio 5, 35122 Padova, ItalyPeter SchneiderArgelander-Institute for Astronomy, University of Bonn, Auf dem Hügel 71, D-53121 Bonn, GermanyCristobál SifónLeiden Observatory Leiden UniversityG. SikkemaAstronomyP. ŠimonArgelander-Institute for Astronomy, University of Bonn, Auf dem Hügel 71, D-53121 Bonn, GermanyA. TudoricaArgelander-Institute for Astronomy, University of Bonn, Auf dem Hügel 71, D-53121 Bonn, GermanyE. A. ValentijnAstronomyGijs Verdoes KleijnAstronomyLudovic Van WaerbekeDepartment of Physics and Astronomy , University of British Columbia , 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada

2015en

ABI

Аннотация

The Kilo-Degree Survey (KiDS) is a multi-band imaging survey designed for cosmological studies from weak lensing and photometric redshifts. It uses the European Southern Observatory VLT Survey Telescope with its wide-field camera OmegaCAM. KiDS images are taken in four filters similar to the Sloan Digital Sky Survey ugri bands. The best seeing time is reserved for deep r-band observations. The median 5σ limiting AB magnitude is 24.9 and the median seeing is below 0.7 arcsec. Initial KiDS observations have concentrated on the Galaxy and Mass Assembly (GAMA) regions near the celestial equator, where extensive, highly complete redshift catalogues are available. A total of 109 survey tiles, 1 square degree each, form the basis of the first set of lensing analyses of halo properties of GAMA galaxies. Nine galaxies per square arcminute enter the lensing analysis, for an effective inverse shear variance of 69 arcmin-2. Accounting for the shape measurement weight, the median redshift of the sources is 0.53. KiDS data processing follows two parallel tracks, one optimized for weak lensing measurement and one for accurate matched-aperture photometry (for photometric redshifts). This technical paper describes the lensing and photometric redshift measurements (including a detailed description of the Gaussian aperture and photometry pipeline), summarizes the data quality and presents extensive tests for systematic errors that might affect the lensing analyses. We also provide first demonstrations of the suitability of the data for cosmological measurements, and describe our blinding procedure for preventing confirmation bias in the scientific analyses. The KiDS catalogues presented in this paper are released to the community through http://kids.strw.leidenuniv.nl.

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Идентификаторы

DOI: 10.1093/mnras/stv2140

Цитирования и источники

Цитирований: 2Использованных источников: 0

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