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

A. Amon; C. Heymans; D. Klaes; T. Erben; C. Blake; H. Hildebrandt; H. Hoekstra; K. Kuijken; L. Miller; C. B. Morrison; A. Choi; J. T.A. de Jong; K. Glazebrook; N. Irisarri; B. Joachimi; S. Joudaki; A. Kannawadi; C. Lidman; N. Napolitano; D. Parkinson; P. Schneider; E. van Uitert; M. Viola; C. Wolf

doi:10.1093/mnras/sty859

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

A. Amon^*, C. Heymans, D. Klaes, T. Erben, C. Blake, H. Hildebrandt, H. Hoekstra, K. Kuijken, L. Miller, C. B. Morrison, A. Choi, J. T.A. de Jong, K. Glazebrook, N. Irisarri, B. Joachimi, S. Joudaki, A. Kannawadi, C. Lidman, N. Napolitano, D. ParkinsonP. Schneider, E. van Uitert, M. Viola, C. Wolf

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

We present a weak gravitational lensing analysis of 815 deg² 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.

Original language	English
Pages (from-to)	4285-4307
Number of pages	23
Journal	Monthly Notices of the Royal Astronomical Society
Volume	477
Issue number	4
Early online date	5 Apr 2018
DOIs	https://doi.org/10.1093/mnras/sty859
Publication status	Published - 11 Jul 2018

Keywords / Materials (for Non-textual outputs)

Cosmology: observations
Galaxies: photometry
Gravitational lensing: weak
Surveys

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10.1093/mnras/sty859

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Amon, A., Heymans, C., Klaes, D., Erben, T., Blake, C., Hildebrandt, H., Hoekstra, H., Kuijken, K., Miller, L., Morrison, C. B., Choi, A., de Jong, J. T. A., Glazebrook, K., Irisarri, N., Joachimi, B., Joudaki, S., Kannawadi, A., Lidman, C., Napolitano, N., ... Wolf, C. (2018). KiDS-i-800: Comparing weak gravitational lensing measurements from same-sky surveys. Monthly Notices of the Royal Astronomical Society, 477(4), 4285-4307. https://doi.org/10.1093/mnras/sty859

@article{32d7c8ee1ca145ae837d943f3850fa47,

title = "KiDS-i-800: Comparing weak gravitational lensing measurements from same-sky surveys",

abstract = "We present a weak gravitational lensing analysis of 815 deg2 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.",

keywords = "Cosmology: observations, Galaxies: photometry, Gravitational lensing: weak, Surveys",

author = "A. Amon and C. Heymans and D. Klaes and T. Erben and C. Blake and H. Hildebrandt and H. Hoekstra and K. Kuijken and L. Miller and Morrison, {C. B.} and A. Choi and {de Jong}, {J. T.A.} and K. Glazebrook and N. Irisarri and B. Joachimi and S. Joudaki and A. Kannawadi and C. Lidman and N. Napolitano and D. Parkinson and P. Schneider and {van Uitert}, E. and M. Viola and C. Wolf",

year = "2018",

month = jul,

day = "11",

doi = "10.1093/mnras/sty859",

language = "English",

volume = "477",

pages = "4285--4307",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "4",

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Amon, A, Heymans, C, Klaes, D, Erben, T, Blake, C, Hildebrandt, H, Hoekstra, H, Kuijken, K, Miller, L, Morrison, CB, Choi, A, de Jong, JTA, Glazebrook, K, Irisarri, N, Joachimi, B, Joudaki, S, Kannawadi, A, Lidman, C, Napolitano, N, Parkinson, D, Schneider, P, van Uitert, E, Viola, M & Wolf, C 2018, 'KiDS-i-800: Comparing weak gravitational lensing measurements from same-sky surveys', Monthly Notices of the Royal Astronomical Society, vol. 477, no. 4, pp. 4285-4307. https://doi.org/10.1093/mnras/sty859

TY - JOUR

T1 - KiDS-i-800

T2 - Comparing weak gravitational lensing measurements from same-sky surveys

AU - Amon, A.

AU - Heymans, C.

AU - Klaes, D.

AU - Erben, T.

AU - Blake, C.

AU - Hildebrandt, H.

AU - Hoekstra, H.

AU - Kuijken, K.

AU - Miller, L.

AU - Morrison, C. B.

AU - Choi, A.

AU - de Jong, J. T.A.

AU - Glazebrook, K.

AU - Irisarri, N.

AU - Joachimi, B.

AU - Joudaki, S.

AU - Kannawadi, A.

AU - Lidman, C.

AU - Napolitano, N.

AU - Parkinson, D.

AU - Schneider, P.

AU - van Uitert, E.

AU - Viola, M.

AU - Wolf, C.

PY - 2018/7/11

Y1 - 2018/7/11

N2 - We present a weak gravitational lensing analysis of 815 deg2 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.

AB - We present a weak gravitational lensing analysis of 815 deg2 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.

KW - Cosmology: observations

KW - Galaxies: photometry

KW - Gravitational lensing: weak

KW - Surveys

UR - http://www.scopus.com/inward/record.url?scp=85047626947&partnerID=8YFLogxK

U2 - 10.1093/mnras/sty859

DO - 10.1093/mnras/sty859

M3 - Article

AN - SCOPUS:85047626947

SN - 0035-8711

VL - 477

SP - 4285

EP - 4307

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

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

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