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dc.contributor.author
Jeffrey, Niall
dc.contributor.author
Abdalla, Filipe B.
dc.contributor.author
Lahav, Ofer
dc.contributor.author
Lanusse, Francois
dc.contributor.author
Starck, Jean-Luc
dc.contributor.author
Leonard, A.
dc.contributor.author
Kirk, Donnacha
dc.contributor.author
Chang, C.
dc.contributor.author
Baxter, Eric
dc.contributor.author
Kacprzak, Tomasz
dc.contributor.author
Seitz, Stella
dc.contributor.author
Vikram, Vinu
dc.contributor.author
Whiteway, Lorne
dc.contributor.author
Abbott, Timothy M.C.
dc.contributor.author
Allam, Sahar
dc.contributor.author
Avila, Santiago
dc.contributor.author
Bertin, Emmanuel
dc.contributor.author
Brooks, David
dc.contributor.author
Carnero Rosell, Aurelio
dc.contributor.author
Carrasco Kind, Matias
dc.contributor.author
Carretero, Jorge
dc.contributor.author
Castander, Francisco J.
dc.contributor.author
Crocce, Martin
dc.contributor.author
Cunha, Carlos E.
dc.contributor.author
D'Andrea, Chris B.
dc.contributor.author
Da Costa, Luiz N.
dc.contributor.author
Davis, Christopher
dc.contributor.author
De Vicente, Juan
dc.contributor.author
Desai, Shantanu
dc.contributor.author
Doel, Peter
dc.contributor.author
Eifler, Tim F.
dc.contributor.author
Evrard, August E.
dc.contributor.author
Flaugher, Brenna
dc.contributor.author
Fosalba, Pablo
dc.contributor.author
Frieman, Josh
dc.contributor.author
Garcia-Bellido, Juan
dc.contributor.author
Gerdes, David W.
dc.contributor.author
Gruen, Daniel
dc.contributor.author
Gruendl, Robert A.
dc.contributor.author
Gschwend, Julia
dc.contributor.author
Gutierrez, Gaston
dc.contributor.author
Hartley, William G.
dc.contributor.author
Honscheid, Klaus
dc.contributor.author
Hoyle, Ben
dc.contributor.author
James, D.J.
dc.contributor.author
Jarvis, Mike
dc.contributor.author
Kuehn, Kyler
dc.contributor.author
Lima, M.
dc.contributor.author
Lin, H.
dc.contributor.author
March, Marisa
dc.contributor.author
Melchior, Peter
dc.contributor.author
Menanteau, Felipe
dc.contributor.author
Miquel, R.
dc.contributor.author
Plazas, Andrés A.
dc.contributor.author
Reil, Kevin
dc.contributor.author
Roodman, Aaron
dc.contributor.author
Sanchez, E.
dc.contributor.author
Scarpine, Victor
dc.contributor.author
Schubnell, Michael
dc.contributor.author
Sevilla-Noarbe, Ignacio
dc.contributor.author
Smith, M.
dc.contributor.author
Soares-Santos, Marcelle
dc.contributor.author
Sobreira, Flavia
dc.contributor.author
Suchyta, Eric
dc.contributor.author
Swanson, Molly E.C.
dc.contributor.author
Tarle, Gregory
dc.contributor.author
Hänsli, Thomas Daniel
dc.contributor.author
Walker, Alistair R.
dc.contributor.author
DES Collaboration
dc.date.accessioned
2018-08-28T11:58:27Z
dc.date.available
2018-08-24T08:28:32Z
dc.date.available
2018-08-28T11:58:27Z
dc.date.issued
2018-09
dc.identifier.issn
0035-8711
dc.identifier.issn
1365-2966
dc.identifier.issn
1365-8711
dc.identifier.other
10.1093/mnras/sty1252
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/284344
dc.identifier.doi
10.3929/ethz-b-000284344
dc.description.abstract
Mapping the underlying density field, including non-visible dark matter, using weak gravitational lensing measurements is now a standard tool in cosmology. Due to its importance to the science results of current and upcoming surveys, the quality of the convergence reconstruction methods should be well understood. We compare three methods: Kaiser–Squires (KS), Wiener filter, and Glimpse. Kaiser–Squires is a direct inversion, not accounting for survey masks or noise. The Wiener filter is well-motivated for Gaussian density fields in a Bayesian framework. Glimpse uses sparsity, aiming to reconstruct non-linearities in the density field. We compare these methods with several tests using public Dark Energy Survey (DES) Science Verification (SV) data and realistic DES simulations. The Wiener filter and Glimpse offer substantial improvements over smoothed Kaiser–Squires with a range of metrics. Both the Wiener filter and Glimpse convergence reconstructions show a 12 per cent improvement in Pearson correlation with the underlying truth from simulations. To compare the mapping methods’ abilities to find mass peaks, we measure the difference between peak counts from simulated ΛCDM shear catalogues and catalogues with no mass fluctuations (a standard data vector when inferring cosmology from peak statistics); the maximum signal-to-noise of these peak statistics is increased by a factor of 3.5 for the Wiener filter and 9 for Glimpse. With simulations, we measure the reconstruction of the harmonic phases; the phase residuals’ concentration is improved 17 per cent by Glimpse and 18 per cent by the Wiener filter. The correlationbetween reconstructions from data and foreground redMaPPer clusters is increased 18 per cent by the Wiener filter and 32 per cent by Glimpse.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Oxford University Press
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
gravitational lensing: weak
en_US
dc.subject
methods: statistical
en_US
dc.subject
large-scale structure of Universe
en_US
dc.title
Improving weak lensing mass map reconstructions using Gaussian and sparsity priors: Application to DES SV
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2018-05-15
ethz.journal.title
Monthly Notices of the Royal Astronomical Society
ethz.journal.volume
479
en_US
ethz.journal.issue
3
en_US
ethz.journal.abbreviated
Mon. not. R. Astron. Soc.
ethz.pages.start
2871
en_US
ethz.pages.end
2888
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Oxford
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02532 - Institut für Teilchen- und Astrophysik / Inst. Particle Physics and Astrophysics::03928 - Refregier, Alexandre / Refregier, Alexandre
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02532 - Institut für Teilchen- und Astrophysik / Inst. Particle Physics and Astrophysics::03928 - Refregier, Alexandre / Refregier, Alexandre
ethz.date.deposited
2018-08-24T08:28:42Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2018-08-28T11:58:36Z
ethz.rosetta.lastUpdated
2018-12-02T13:15:10Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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