KiDS-i-800: comparing weak gravitational lensing measurements from same-sky surveys

被引：24

作者：

Amon, A. ^{[1
]}

Heymans, C. ^{[1
]}

Klaes, D. ^{[2
]}

Erben, T. ^{[2
]}

Blake, C. ^{[3
]}

Hildebrandt, H. ^{[2
]}

Hoekstra, H. ^{[4
]}

Kuijken, K. ^{[4
]}

Miller, L. ^{[5
]}

Morrison, C. B. ^{[6
]}

Choi, A. ^{[7
]}

de Jong, J. T. A. ^{[4
,8
]}

Glazebrook, K. ^{[3
]}

Irisarri, N. ^{[4
]}

Joachimi, B. ^{[9
]}

Joudaki, S. ^{[5
]}

Kannawadi, A. ^{[4
]}

Lidman, C. ^{[10
]}

Napolitano, N. ^{[11
]}

Parkinson, D. ^{[12
]}

Schneider, P. ^{[2
]}

van Uitert, E. ^{[9
]}

Viola, M. ^{[4
]}

Wolf, C. ^{[13
]}

机构：

[1] Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland

[2] Argelander Inst Astronomie, Auf hugel 71, D-53121 Bonn, Germany

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

[4] Leiden Univ, Leiden Observ, Niels Bohrweg 2, NL-2333 CA Leiden, Netherlands

[5] Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England

[6] Univ Washington, Dept Astron, Box 351580, Seattle, WA 98195 USA

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

[8] Univ Groningen, Kapteyn Astron Inst, NL-9700 AD Groningen, Netherlands

[9] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England

[10] Australian Astron Observ, POB 915, N Ryde, NSW 1670, Australia

[11] Osserv Astron Capodimonte, INAF, Via Moiariello 16, I-80131 Naples, Italy

[12] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

[13] Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2018年 / 477卷 / 04期

基金：

澳大利亚研究理事会; 欧洲研究理事会; 美国国家科学基金会;

关键词：

gravitational lensing: weak; surveys; galaxies: photometry; cosmology: observations; COSMIC SHEAR; REDSHIFT DISTRIBUTIONS; PHOTOMETRIC REDSHIFTS; CROSS-CORRELATIONS; GALAXY; CFHTLENS; CONSTRAINTS; COSMOLOGY; PROGRAM; CATALOG;

D O I：

10.1093/mnras/sty859

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a weak gravitational lensing analysis of 815 deg(2) of i-band imaging from the Kilo-Degree Survey (KiDS-i-800). In contrast to the deep r-band observations, which take priority during excellent seeing conditions and form the primary KiDS data set (KiDS-r-450), the complementary yet shallower KiDS-i-800 spans a wide range of observing conditions. The overlapping KiDS-i-800 and KiDS-r-450 imaging therefore provides a unique opportunity to assess the robustness of weak lensing measurements. In our analysis we introduce two new 'null' tests. The 'nulled' two-point shear correlation function uses a matched catalogue to show that the calibrated KiDS-i-800 and KiDS-r-450 shear measurements agree at the level of 1 +/- 4 per cent. We use five galaxy lens samples to determine a 'nulled' galaxy-galaxy lensing signal from the full KiDS-i-800 and KiDS-r-450 surveys and find that the measurements agree to 7 +/- 5 per cent when the KiDS-i-800 source redshift distribution is calibrated using either spectroscopic redshifts, or the 30-band photometric redshifts from the COSMOS survey.

引用

页码：4285 / 4307

页数：23

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