Lensing catalogs 2015

Weak lensing shear catalogs were created based on the overlap of KiDS-ESO-DR1 and KiDS-ESO-DR2 with the equatorial regions of the Galaxy And Mass Assembly (GAMA) survey. This corresponds to 109 survey tiles, and a total unmasked area of 75.1 square degrees.

The data contained in the catalogs is partly based on the data products released in the public data releases and partly on a dedicated and highly specialized weak lensing shear pipeline. Galaxy shape measurements are done using a dedicated, lensing-optimized, data reducation and processing procedure using the THELI pipeline and Lensfit shear measurement software that was also used for the weak lensing analysis of the CFHT Legacy Survey (CFHTLenS). The photometry and photometric redshifts are derived from the coadded images released in the first two public data releases. For this, the images are first convolved to have a constant, round, gaussian PSF, after which photometry is performed using Gaussian-weighted apertures. Details on this so-called Gaussian Aperture and PSF (GAaP) photometry, on all other aspects of the specialized shear measurement pipeline, and various systematics tests of the catalogs can be found in the technical paper listed below (Kuijken et al. 2015).

Please note that the sources included in these lensing catalogs do not correspond exactly to the sources included in the KiDS-ESO-DR1/2 catalogs.

Catalog download

Below are direct links to the lensing catalogs described on this page, stored on the OmegaCEN data servers. One catalog is provided for each of the equatorial GAMA regions: G09, G12 and G15. The catalogs are in LDAC-FITS format which can be queried using all standard FITS tools, and LDAC tools.

We are keen for the community to make full use this data product, so do not hesitate to contact Konrad Kuijken, Catherine Heymans, Hendrik Hildebrandt and Massimo Viola if you have any questions about the lensing catalogues.

Acknowledgements

Users of these data should include the following acknowledgment to the source of the data:

Based on data products from observations made with ESO Telescopes at the La Silla Paranal Observatory under programme IDs 177.A-3016, 177.A-3017 and 177.A-3018.

and should cite Kuijken et al. (2015) as follows:

We use cosmic shear measurements from the Kilo-Degree Survey (Kuijken et al. 2015), hereafter referred to as KiDS. The KiDS data are processed by THELI (Erben et al. 2013) and Astro-WISE (Begeman et al. 2013, de Jong et al 2015). Shears are measured using lensfit (Miller et al. 2013), and photometric redshifts are obtained from PSF-matched photometry.

Publications

The following publications by the KiDS team make use of the lensing catalogs described here.

Dependence of GAMA galaxy halo masses on the cosmic web environment from 100 square degrees of KiDS weak lensing data
M. M. Brouwer, M. Cacciato, A. Dvornik, L. Eardley, C. Heymans, H. Hoekstra, K. Kuijken, T. McNaught-Roberts, C. Sifón, M. Viola, M. Alpaslan, M. Bilicki, J. Bland-Hawthorn, S. Brough, A. Choi, S. P. Driver, T. Erben, A. Grado, H. Hildebrandt, B. W. Holwerda, A. M. Hopkins, J. T. A. de Jong, J. Liske, J. McFarland, R. Nakajima, N. R. Napolitano, P. Norberg, J. A. Peacock, M. Radovich, A. S. G. Robotham, P. Schneider, G. Sikkema, E. van Uitert, G. Verdoes Kleijn, 2016, MNRAS, 462, 4451

The stellar-to-halo mass relation of GAMA galaxies from 100 square degrees of KiDS weak lensing data
E. van Uitert, M. Cacciato, H. Hoekstra, M. Brouwer, C. Sifón, M. Viola, I. Baldry, J. Bland-Hawthorn, S. Brough, M. J. I. Brown, A. Choi, S. P. Driver, T. Erben, C. Heymans, H. Hildebrandt, B. Joachimi, K. Kuijken, J. Liske, J. Loveday, J. McFarland, L. Miller, R. Nakajima, J. Peacock, M. Radovich, A. S. G. RobothamP. Schneider, G. Sikkema, E. N. Taylor, G. Verdoes Kleijn, 2016, MNRAS, 459, 3251

Dark matter halo properties of GAMA galaxy groups from 100 square degrees of KiDS weak lensing data
M. Viola, M. Cacciato, M. Brouwer, K. Kuijken, H. Hoekstra, P. Norberg, A.S.G. Robotham, E. van Uitert, M. Alpaslan, I.K. Baldry, A. Choi, J.T.A. de Jong, S.P. Driver, T. Erben, A. Grado, Alister W. Graham, C. Heymans, H. Hildebrandt, A.M. Hopkins, N. Irisarri, B. Joachimi, J. Loveday, L. Miller, R. Nakajima, P. Schneider, C. Sifón, G. Verdoes Kleijn, 2015, MNRAS, 452, 3529

Gravitational Lensing Analysis of the Kilo Degree Survey
K. Kuijken, C. Heymans, H. Hildebrandt, R. Nakajima, T. Erben, J. T. A. de Jong, M. Viola, A. Choi, H. Hoekstra, L. Miller, E. van Uitert, A. Amon, C. Blake, M. Brouwer, A. Buddendiek, I. Fenech Conti, M. B. Eriksen, A. Grado, J. Harnois-Déraps, E. Helmich, R. Herbonnet, N. Irisarri, T. D. Kitching, D. Klaes, F. Labarbera, N. R. Napolitano, M. Radovich, P. Schneider, C. Sifón, G. Sikkema, P. Simon, A. Tudorica, E. A. Valentijn, G. Verdoes Kleijn, L. van Waerbeke, 2015, MNRAS, 454, 3500

The masses of satellites in GAMA galaxy groups from 100 square degrees of KiDS weak lensing data
C. Sifón, M. Cacciato, H. Hoekstra, M. Brouwer, E. van Uitert, M. Viola, I. Baldry, S. Brough, M. J. I. Brown, A. Choi, S. P. Driver, T. Erben, A. Grado, C. Heymans, H. Hildebrandt, B. Joachimi, J. T. A. de Jong, K. Kuijken, J. P. McFarland, L. Miller, R. Nakajima, N. R. Napolitano, P. Norberg, A. S. G. Robotham, P. Schneider, G. Verdoes Klein, 2015, MNRAS, 454, 3938