The third data release of the Kilo-Degree Survey and associated data products

被引：168

作者：

de Jong, Jelte T. A. ^{[1
]}

Kleijn, Gijs A. Verdoes ^{[2
]}

Erben, Thomas ^{[3
]}

Hildebrandt, Hendrik ^{[3
]}

Kuijken, Konrad ^{[1
]}

Sikkema, Gert ^{[2
]}

Brescia, Massimo ^{[4
]}

Bilicki, Maciej ^{[1
,5
]}

Napolitano, Nicola R. ^{[4
]}

Amaro, Valeria ^{[6
]}

Begeman, Kor G. ^{[2
]}

Boxhoorn, Danny R. ^{[2
]}

Buddelmeijer, Hugo ^{[1
]}

Cavuoti, Stefano ^{[4
,6
]}

Getman, Fedor ^{[4
]}

Grado, Aniello ^{[4
]}

Helmich, Ewout ^{[2
]}

Huang, Zhuoyi ^{[4
]}

Irisarri, Nancy ^{[1
]}

La Barbera, Francesco ^{[4
]}

Longo, Giuseppe ^{[6
]}

McFarland, John P. ^{[2
]}

Nakajima, Reiko ^{[3
]}

Paolillo, Maurizio ^{[6
]}

Puddu, Emanuella ^{[4
]}

Radovich, Mario ^{[7
]}

Rifatto, Agatino ^{[4
]}

Tortora, Crescenzo ^{[2
]}

Valentijn, Edwin A. ^{[2
]}

Vellucci, Civita ^{[6
]}

Vriend, Willem-Jan ^{[2
]}

Amon, Alexandra ^{[8
]}

Blake, Chris ^{[9
]}

Choi, Ami ^{[8
,10
]}

Conti, Ian Fenech ^{[11
,12
]}

Gwyn, Stephen D. J. ^{[13
]}

Herbonnet, Ricardo ^{[1
]}

Heymans, Catherine ^{[8
]}

Hoekstra, Henk ^{[1
]}

Klaes, Dominik ^{[3
]}

Merten, Julian ^{[14
]}

Miller, Lance ^{[14
]}

Schneider, Peter ^{[3
]}

Viola, Massimo ^{[1
]}

机构：

[1] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands

[2] Univ Groningen, Kapteyn Astron Inst, POB 800, NL-9700 AV Groningen, Netherlands

[3] Argelander Inst Astron, Auf Huel 71, D-53121 Bonn, Germany

[4] INAF, Osservatorio Astron Capodimonte, Via Moiariello 16, I-80131 Naples, Italy

[5] Natl Ctr Nucl Res, Astrophys Div, POB 447, PL-90950 Lodz, Poland

[6] Univ Federico II, Dept Phys E Pancini, Via Cinthia 6, I-80126 Naples, Italy

[7] INAF, Osservatorio Astronomico Padova, Via Osservatorio 5, I-35122 Padua, Italy

[8] Univ Edinburgh, Scottish Univ Phys Alliance, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland

[9] Swinburne Univ Technol, Ctr Astrophys Supercomp, POB 218, Hawthorn, Vic 3122, Australia

[10] Ohio State Univ, Ctr Cosmol & AstroParticle Phys, 191 West Woodruff Ave, Columbus, OH 43210 USA

[11] Univ Malta, Inst Space Sci & Astron, Msida 2080, Msd, Malta

[12] Univ Malta, Dept Phys, Msida 2080, Msd, Malta

[13] Canadian Astron Data Ctr, Herzberg Astron & Astrophys, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada

[14] Univ Oxford, Dept Phys, Keble Rd, Oxford OX1 3RH, England

来源：

ASTRONOMY & ASTROPHYSICS | 2017年 / 604卷

基金：

欧洲研究理事会; 澳大利亚研究理事会;

关键词：

surveys; catalogs; techniques: photometric; techniques: image processing; GALAXY REDSHIFT SURVEY; MASS ASSEMBLY GAMA; 100 SQUARE DEGREES; PHOTOMETRIC REDSHIFTS; LENSING SURVEY; SURVEY DESIGN; REDUCTION; CFHTLENS; ENVIRONMENT; ZCOSMOS;

D O I：

10.1051/0004-6361/201730747

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. The Kilo-Degree Survey (KiDS) is an ongoing optical wide-field imaging survey with the OmegaCAM camera at the VLT Survey Telescope. It aims to image 1500 square degrees in four filters (ugri). The core science driver is mapping the large-scale matter distribution in the Universe, using weak lensing shear and photometric redshift measurements. Further science cases include galaxy evolution, Milky Way structure, detection of high-redshift clusters, and finding rare sources such as strong lenses and quasars. Aims. Here we present the third public data release and several associated data products, adding further area, homogenized photometric calibration, photometric redshifts and weak lensing shear measurements to the first two releases. Methods. A dedicated pipeline embedded in the Astro-WISE information system is used for the production of the main release. Modifications with respect to earlier releases are described in detail. Photometric redshifts have been derived using both Bayesian template fitting, and machine-learning techniques. For the weak lensing measurements, optimized procedures based on the THELI data reduction and lensfit shear measurement packages are used. Results. In this third data release an additional 292 new survey tiles (approximate to 300 deg(2)) stacked ugri images are made available, accompanied by weight maps, masks, and source lists. The multi-band catalogue, including homogenized photometry and photometric redshifts, covers the combined DR1, DR2 and DR3 footprint of 440 survey tiles (44 deg2). Limiting magnitudes are typically 24.3, 25.1, 24.9, 23.8 (5 '' in a 2 0 0 aperture) in ugri, respectively, and the typical r-band PSF size is less than 0.7 0 0. The photometric homogenization scheme ensures accurate colours and an absolute calibration stable to approximate to 2% for gri and approximate to 3% in u. Separately released for the combined area of all KiDS releases to date are a weak lensing shear catalogue and photometric redshifts based on two different machine-learning techniques.

引用

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