Gravitational lensing analysis of the Kilo-Degree Survey

By K. Kuijken, Catherine Heymans, H. Hildebrandt, R. Nakajima, T. Erben, J. D. de Jong, M. Viola, A. Choi, H. Hoekstra, L. Miller and 25 more. 2015

298 citations recorded by the source corpus.

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.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/3e42f1f0fa9c8659a4420e1487c771642449c55c

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Citations in the corpus

KiDS-450: testing extensions to the standard cosmological model (2016, methodology): “4 C O N C L U S I O N S We have performed an extended lensing systematics and cosmology analysis of the tomographic weak gravitational lensing measurements of the KiDS (de Jong et al. 2013; Kuijken et al. 2015; Hildebrandt et al. 2017).”
KiDS-450 + 2dFLenS: Cosmological parameter constraints from weak gravitational lensing tomography and overlapping redshift-space galaxy clustering (2017, methodology): “Our galaxy shape measurements are obtained from the KiDS450 dataset (Kuijken et al. 2015; de Jong et al. 2017; Hildebrandt et al. 2017), which covers an effective area of 360 deg2 on the sky (Fig.”
KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing (2016, methodology): “12 of that paper) and Kuijken et al. (2015) (see section 5.2 and fig.”
KiDS+VIKING-450: Cosmic shear tomography with optical and infrared data (2018, methodology): “Recently, we presented one of the most robust cosmic shear analyses to date (Hildebrandt et al. 2017; hereafter H17) based on data from the European Southern Observatory’s Kilo-Degree Survey (KiDS; Kuijken et al. 2015; de Jong et al. 2015, 2017).”
The Hyper Suprime-Cam Software Pipeline (2017, methodology): “Like DES, KiDS, and LSST, many of HSC’s science goals are cosmological; we seek to measure the distribution and evolution of structure in the universe and use these to infer the properties of dark matter and dark energy.”
The DES Science Verification weak lensing shear catalogues (2015, methodology): “Most of our null tests were similar to ones that have been performed in previous analyses (cf. e.g. Jarvis et al. 2003; Schrabback et al. 2010; Velander et al. 2011; Heymans et al. 2012b; Jee et al. 2013; Kuijken et al. 2015).”
The fourth data release of the Kilo-Degree Survey: ugri imaging and nine-band optical-IR photometry over 1000 square degrees (2019, methodology): “For further discussion of the choice of GAaP aperture size, see Kuijken et al. (2015), Appendix A2.”
Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data (2018, background): “These Stage III surveys, which include the Kilo-Degree survey (KiDS; Kuijken et al. 2015), the Dark Energy Survey (DES; Abbott et al. 2016; Becker et al. 2016), and the Hyper Suprime-Cam (HSC) survey (Aihara et al. 2018b, 2018a), are expected to yield constraints on cosmological parameters from the…”
KiDS-450: The tomographic weak lensing power spectrum and constraints on cosmological parameters (2017, methodology): “Data from large weak lensing surveys such as the Kilo Degree Survey (KiDS; de Jong et al. 2013, 2015; Kuijken et al. 2015; de Jong et al. 2017), the Subaru Hyper SuprimeCam lensing survey (Miyazaki et al. 2015; Aihara et al. 2017) and the Dark Energy Survey (DES; Jarvis et al. 2016) are currently…”