Cosmic shear measurements with Dark Energy Survey Science Verification data

The Dark Energy Survey Collaboration

doi:10.1103/PhysRevD.94.022002

Cosmic shear measurements with Dark Energy Survey Science Verification data

The Dark Energy Survey Collaboration

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Abstract

We present measurements of weak gravitational lensing cosmic shear two-point statistics using Dark Energy Survey Science Verification data. We demonstrate that our results are robust to the choice of shear measurement pipeline, either ngmix or im3shape, and robust to the choice of two-point statistic, including both real and Fourier-space statistics. Our results pass a suite of null tests including tests for B-mode contamination and direct tests for any dependence of the two-point functions on a set of 16 observing conditions and galaxy properties, such as seeing, airmass, galaxy color, galaxy magnitude, etc. We furthermore use a large suite of simulations to compute the covariance matrix of the cosmic shear measurements and assign statistical significance to our null tests. We find that our covariance matrix is consistent with the halo model prediction, indicating that it has the appropriate level of halo sample variance. We compare the same jackknife procedure applied to the data and the simulations in order to search for additional sources of noise not captured by the simulations. We find no statistically significant extra sources of noise in the data. The overall detection significance with tomography for our highest source density catalog is 9.7σ. Cosmological constraints from the measurements in this work are presented in a companion paper [DES, Phys. Rev. D 94, 022001 (2016).].

Original language	English
Article number	022002
Journal	Physical Review D
Volume	94
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevD.94.022002
State	Published - Jul 6 2016
Externally published	Yes

Funding

The DES data management system is supported by the National Science Foundation under Grant NumberAST-1138766. The DES participants from Spanish institutions are partially supported by MINECO under grants AYA2012-39559, ESP2013-48274, FPA2013-47986, and Centro de Excelencia Severo Ochoa SEV-2012-0234, some of which include ERDF funds from the European Union. The Collaborating Institutions are Argonne National Laboratory, the University of California at Santa Cruz, the University of Cambridge, Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas-Madrid, the University of Chicago, University College London, the DES-Brazil Consortium, the Eidgenssische Technische Hochschule (ETH) Zrich, Fermi National Accelerator Laboratory, the University of Edinburgh, the University of Illinois at Urbana-Champaign, the Institut de Cincies de l'Espai (IEEC/CSIC), the Institut de Fsica d'Altes Energies, Lawrence Berkeley National Laboratory, the Ludwig-Maximilians Universitt and the associated Excellence Cluster Universe, the University of Michigan, the National Optical Astronomy Observatory, the University of Nottingham, The Ohio State University, the University of Pennsylvania, the University of Portsmouth, SLAC National Accelerator Laboratory, Stanford University, the University of Sussex, and Texas A&M University. This paper is Fermilab publication FERMILAB-PUB-15-303-AE and DES publication DES-2015-0061. This paper has gone through internal review by the DES collaboration.

Funders	Funder number
Not added	ST/I000879/1, ST/J001511/1
Centro de Excelencia Severo Ochoa	SEV-2012-0234
Collaborating Institutions are Argonne National Laboratory
Institut de Cincies de l'Espai
Institut de Fsica d'Altes Energies
Ludwig-Maximilians Universitt
National Science Foundation	NumberAST-1138766, 1211838, 1138766, 1053575, 1125897, 1311924, 1138729, 1536171
University of Illinois at Urbana-Champaign
Stanford University
Fermilab
Lawrence Berkeley National Laboratory
University of California, Santa Cruz
University of Pennsylvania
Ohio State University
University of Chicago
University of Michigan
Texas A and M University
University of Portsmouth
Seventh Framework Programme	240672
SLAC National Accelerator Laboratory
Science and Technology Facilities Council	ST/K00090X/1, ST/L000768/1, ST/M001334/1, ST/M004708/1, ST/N000668/1, ST/F001991/1
University College London
European Commission
University of Nottingham
University of Sussex
University of Edinburgh
Eidgenössische Technische Hochschule Zürich
Ministerio de Economía y Competitividad	FPA2013-47986, AYA2012-39559, ESP2013-48274
European Regional Development Fund

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10.1103/PhysRevD.94.022002

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@article{c83ed9f6fe8d4c55ae06326a04f6c3c7,

title = "Cosmic shear measurements with Dark Energy Survey Science Verification data",

abstract = "We present measurements of weak gravitational lensing cosmic shear two-point statistics using Dark Energy Survey Science Verification data. We demonstrate that our results are robust to the choice of shear measurement pipeline, either ngmix or im3shape, and robust to the choice of two-point statistic, including both real and Fourier-space statistics. Our results pass a suite of null tests including tests for B-mode contamination and direct tests for any dependence of the two-point functions on a set of 16 observing conditions and galaxy properties, such as seeing, airmass, galaxy color, galaxy magnitude, etc. We furthermore use a large suite of simulations to compute the covariance matrix of the cosmic shear measurements and assign statistical significance to our null tests. We find that our covariance matrix is consistent with the halo model prediction, indicating that it has the appropriate level of halo sample variance. We compare the same jackknife procedure applied to the data and the simulations in order to search for additional sources of noise not captured by the simulations. We find no statistically significant extra sources of noise in the data. The overall detection significance with tomography for our highest source density catalog is 9.7σ. Cosmological constraints from the measurements in this work are presented in a companion paper [DES, Phys. Rev. D 94, 022001 (2016).].",

author = "{The Dark Energy Survey Collaboration} and Becker, {M. R.} and Troxel, {M. A.} and N. Maccrann and E. Krause and Eifler, {T. F.} and O. Friedrich and A. Nicola and A. Refregier and A. Amara and D. Bacon and Bernstein, {G. M.} and C. Bonnett and Bridle, {S. L.} and Busha, {M. T.} and C. Chang and S. Dodelson and B. Erickson and Evrard, {A. E.} and J. Frieman and E. Gaztanaga and D. Gruen and W. Hartley and B. Jain and M. Jarvis and T. Kacprzak and D. Kirk and A. Kravtsov and B. Leistedt and Peiris, {H. V.} and Rykoff, {E. S.} and C. Sabiu and C. S{\'a}nchez and H. Seo and E. Sheldon and Wechsler, {R. H.} and J. Zuntz and T. Abbott and Abdalla, {F. B.} and S. Allam and R. Armstrong and M. Banerji and Bauer, {A. H.} and A. Benoit-L{\'e}vy and E. Bertin and D. Brooks and E. Buckley-Geer and Burke, {D. L.} and D. Capozzi and {Carnero Rosell}, A. and E. Suchyta",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = jul,

day = "6",

doi = "10.1103/PhysRevD.94.022002",

language = "English",

volume = "94",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

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T1 - Cosmic shear measurements with Dark Energy Survey Science Verification data

AU - The Dark Energy Survey Collaboration

AU - Becker, M. R.

AU - Troxel, M. A.

AU - Maccrann, N.

AU - Krause, E.

AU - Eifler, T. F.

AU - Friedrich, O.

AU - Nicola, A.

AU - Refregier, A.

AU - Amara, A.

AU - Bacon, D.

AU - Bernstein, G. M.

AU - Bonnett, C.

AU - Bridle, S. L.

AU - Busha, M. T.

AU - Chang, C.

AU - Dodelson, S.

AU - Erickson, B.

AU - Evrard, A. E.

AU - Frieman, J.

AU - Gaztanaga, E.

AU - Gruen, D.

AU - Hartley, W.

AU - Jain, B.

AU - Jarvis, M.

AU - Kacprzak, T.

AU - Kirk, D.

AU - Kravtsov, A.

AU - Leistedt, B.

AU - Peiris, H. V.

AU - Rykoff, E. S.

AU - Sabiu, C.

AU - Sánchez, C.

AU - Seo, H.

AU - Sheldon, E.

AU - Wechsler, R. H.

AU - Zuntz, J.

AU - Abbott, T.

AU - Abdalla, F. B.

AU - Allam, S.

AU - Armstrong, R.

AU - Banerji, M.

AU - Bauer, A. H.

AU - Benoit-Lévy, A.

AU - Bertin, E.

AU - Brooks, D.

AU - Buckley-Geer, E.

AU - Burke, D. L.

AU - Capozzi, D.

AU - Carnero Rosell, A.

AU - Suchyta, E.

PY - 2016/7/6

Y1 - 2016/7/6

N2 - We present measurements of weak gravitational lensing cosmic shear two-point statistics using Dark Energy Survey Science Verification data. We demonstrate that our results are robust to the choice of shear measurement pipeline, either ngmix or im3shape, and robust to the choice of two-point statistic, including both real and Fourier-space statistics. Our results pass a suite of null tests including tests for B-mode contamination and direct tests for any dependence of the two-point functions on a set of 16 observing conditions and galaxy properties, such as seeing, airmass, galaxy color, galaxy magnitude, etc. We furthermore use a large suite of simulations to compute the covariance matrix of the cosmic shear measurements and assign statistical significance to our null tests. We find that our covariance matrix is consistent with the halo model prediction, indicating that it has the appropriate level of halo sample variance. We compare the same jackknife procedure applied to the data and the simulations in order to search for additional sources of noise not captured by the simulations. We find no statistically significant extra sources of noise in the data. The overall detection significance with tomography for our highest source density catalog is 9.7σ. Cosmological constraints from the measurements in this work are presented in a companion paper [DES, Phys. Rev. D 94, 022001 (2016).].

AB - We present measurements of weak gravitational lensing cosmic shear two-point statistics using Dark Energy Survey Science Verification data. We demonstrate that our results are robust to the choice of shear measurement pipeline, either ngmix or im3shape, and robust to the choice of two-point statistic, including both real and Fourier-space statistics. Our results pass a suite of null tests including tests for B-mode contamination and direct tests for any dependence of the two-point functions on a set of 16 observing conditions and galaxy properties, such as seeing, airmass, galaxy color, galaxy magnitude, etc. We furthermore use a large suite of simulations to compute the covariance matrix of the cosmic shear measurements and assign statistical significance to our null tests. We find that our covariance matrix is consistent with the halo model prediction, indicating that it has the appropriate level of halo sample variance. We compare the same jackknife procedure applied to the data and the simulations in order to search for additional sources of noise not captured by the simulations. We find no statistically significant extra sources of noise in the data. The overall detection significance with tomography for our highest source density catalog is 9.7σ. Cosmological constraints from the measurements in this work are presented in a companion paper [DES, Phys. Rev. D 94, 022001 (2016).].

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U2 - 10.1103/PhysRevD.94.022002

DO - 10.1103/PhysRevD.94.022002

M3 - Article

AN - SCOPUS:84978401168

SN - 2470-0010

VL - 94

JO - Physical Review D

JF - Physical Review D

IS - 2

M1 - 022002

ER -

Cosmic shear measurements with Dark Energy Survey Science Verification data

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