Dark Energy Survey year 3 results: covariance modelling and its impact on parameter estimation and quality of fit
dc.date.accessioned | 2022-02-24T17:57:13Z | |
dc.date.available | 2022-02-24T17:57:13Z | |
dc.date.created | 2022-02-01T16:17:16Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Friedrich, Oliver Andrade-Oliveira, F. Camacho, Hugo Alves, O. Rosenfeld, R. Sanchez, J. Fang, Xiao Eifler, Tim F. Krause, E. Chang, C. Omori, Y. Amon, A. Baxter, E. Elvin-Poole, J. Huterer, Dragan Porredon, Anna Prat, Judit Terra, V. Troja, A. Alarcon, A. Bechtol, Keith Bernstein, Gary M. Buchs, R. Campos, A. Cornero Rosell, Aurelio Carrasco Kind, Matias Cawthon, R. Choi, A. Cordero, J. Crocce, Martin Davis, C. DeRose, J. Diehl, Herman T. Dodelson, Scott Doux, Cyrille Drlica-Wagner, Alex Elsner, F. Everett, S. Fosalba, Pablo Gatti, M. Giannini, G. Gruen, Daniel Gruendl, Robert A. Harrison, Ian Hartley, William G. Jain, Bhuvnesh Jarvis, M. MacCrann, Niall McCullough, J. Muir, J. Myles, Justin Pandey, S. Raveri, Marco Roodman, A. Rodriguez-Monroy, Martin Rykoff, Eli S. Samuroff, Simon Sánchez, C. Secco, Lucas Frozza Sevilla-Noarbe, Ignacio Sheldon, E. Troxel, Michael A. Weaverdyck, Noah Yanny, Brian Aguena, Michel Avila, S. Bacon, D. Bertin, E. Bhargava, S. Brooks, D. Burke, David L. Carretero, J. Costanzi, Matteo da Costa, L. N. Pereira, Maria Elidaiana da Silva De Vicente, Juan Desai, S. Evrard, August E. Ferrero, Ismael Frieman, J. García-Bellido, Juan Gaztañaga, Enrique Gerdes, David W. Giannantonio, Tommaso Gschwend, J. Gutierrez, G. Hinton, Samuel R. Hollowood, Devon L. Honscheid, Klaus James, D. J. Kuehn, Kyler Lahav, Ofer Lima, M. Maia, Marcio A. G. Menanteau, Felipe Miquel, R. Morgan, R. Palmese, Antonella Paz-Chinchón, Francisco Plazas, Andrés A. Sanchez, E. Scarpine, V. Serrano, S. Soares-Santos, Marcelle Smith, M. Suchyta, E. Tarlé, Gregory Thomas, D. To, Chun-Hao Varga, Tamas Norbert Weller, Jochen Wilkinson, R. D. . Dark Energy Survey year 3 results: covariance modelling and its impact on parameter estimation and quality of fit. Monthly notices of the Royal Astronomical Society. 2021, 508(3), 3125-3165 | |
dc.identifier.uri | http://hdl.handle.net/10852/91483 | |
dc.description.abstract | We describe and test the fiducial covariance matrix model for the combined two-point function analysis of the Dark Energy Survey Year 3 (DES-Y3) data set. Using a variety of new ansatzes for covariance modelling and testing, we validate the assumptions and approximations of this model. These include the assumption of Gaussian likelihood, the trispectrum contribution to the covariance, the impact of evaluating the model at a wrong set of parameters, the impact of masking and survey geometry, deviations from Poissonian shot noise, galaxy weighting schemes, and other sub-dominant effects. We find that our covariance model is robust and that its approximations have little impact on goodness of fit and parameter estimation. The largest impact on best-fitting figure-of-merit arises from the so-called fsky approximation for dealing with finite survey area, which on average increases the χ2 between maximum posterior model and measurement by 3.7 per cent (Δχ2 ≈ 18.9). Standard methods to go beyond this approximation fail for DES-Y3, but we derive an approximate scheme to deal with these features. For parameter estimation, our ignorance of the exact parameters at which to evaluate our covariance model causes the dominant effect. We find that it increases the scatter of maximum posterior values for Ωm and σ8 by about 3 per cent and for the dark energy equation-of-state parameter by about 5 per cent. | |
dc.language | EN | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Dark Energy Survey year 3 results: covariance modelling and its impact on parameter estimation and quality of fit | |
dc.type | Journal article | |
dc.creator.author | Friedrich, Oliver | |
dc.creator.author | Andrade-Oliveira, F. | |
dc.creator.author | Camacho, Hugo | |
dc.creator.author | Alves, O. | |
dc.creator.author | Rosenfeld, R. | |
dc.creator.author | Sanchez, J. | |
dc.creator.author | Fang, Xiao | |
dc.creator.author | Eifler, Tim F. | |
dc.creator.author | Krause, E. | |
dc.creator.author | Chang, C. | |
dc.creator.author | Omori, Y. | |
dc.creator.author | Amon, A. | |
dc.creator.author | Baxter, E. | |
dc.creator.author | Elvin-Poole, J. | |
dc.creator.author | Huterer, Dragan | |
dc.creator.author | Porredon, Anna | |
dc.creator.author | Prat, Judit | |
dc.creator.author | Terra, V. | |
dc.creator.author | Troja, A. | |
dc.creator.author | Alarcon, A. | |
dc.creator.author | Bechtol, Keith | |
dc.creator.author | Bernstein, Gary M. | |
dc.creator.author | Buchs, R. | |
dc.creator.author | Campos, A. | |
dc.creator.author | Cornero Rosell, Aurelio | |
dc.creator.author | Carrasco Kind, Matias | |
dc.creator.author | Cawthon, R. | |
dc.creator.author | Choi, A. | |
dc.creator.author | Cordero, J. | |
dc.creator.author | Crocce, Martin | |
dc.creator.author | Davis, C. | |
dc.creator.author | DeRose, J. | |
dc.creator.author | Diehl, Herman T. | |
dc.creator.author | Dodelson, Scott | |
dc.creator.author | Doux, Cyrille | |
dc.creator.author | Drlica-Wagner, Alex | |
dc.creator.author | Elsner, F. | |
dc.creator.author | Everett, S. | |
dc.creator.author | Fosalba, Pablo | |
dc.creator.author | Gatti, M. | |
dc.creator.author | Giannini, G. | |
dc.creator.author | Gruen, Daniel | |
dc.creator.author | Gruendl, Robert A. | |
dc.creator.author | Harrison, Ian | |
dc.creator.author | Hartley, William G. | |
dc.creator.author | Jain, Bhuvnesh | |
dc.creator.author | Jarvis, M. | |
dc.creator.author | MacCrann, Niall | |
dc.creator.author | McCullough, J. | |
dc.creator.author | Muir, J. | |
dc.creator.author | Myles, Justin | |
dc.creator.author | Pandey, S. | |
dc.creator.author | Raveri, Marco | |
dc.creator.author | Roodman, A. | |
dc.creator.author | Rodriguez-Monroy, Martin | |
dc.creator.author | Rykoff, Eli S. | |
dc.creator.author | Samuroff, Simon | |
dc.creator.author | Sánchez, C. | |
dc.creator.author | Secco, Lucas Frozza | |
dc.creator.author | Sevilla-Noarbe, Ignacio | |
dc.creator.author | Sheldon, E. | |
dc.creator.author | Troxel, Michael A. | |
dc.creator.author | Weaverdyck, Noah | |
dc.creator.author | Yanny, Brian | |
dc.creator.author | Aguena, Michel | |
dc.creator.author | Avila, S. | |
dc.creator.author | Bacon, D. | |
dc.creator.author | Bertin, E. | |
dc.creator.author | Bhargava, S. | |
dc.creator.author | Brooks, D. | |
dc.creator.author | Burke, David L. | |
dc.creator.author | Carretero, J. | |
dc.creator.author | Costanzi, Matteo | |
dc.creator.author | da Costa, L. N. | |
dc.creator.author | Pereira, Maria Elidaiana da Silva | |
dc.creator.author | De Vicente, Juan | |
dc.creator.author | Desai, S. | |
dc.creator.author | Evrard, August E. | |
dc.creator.author | Ferrero, Ismael | |
dc.creator.author | Frieman, J. | |
dc.creator.author | García-Bellido, Juan | |
dc.creator.author | Gaztañaga, Enrique | |
dc.creator.author | Gerdes, David W. | |
dc.creator.author | Giannantonio, Tommaso | |
dc.creator.author | Gschwend, J. | |
dc.creator.author | Gutierrez, G. | |
dc.creator.author | Hinton, Samuel R. | |
dc.creator.author | Hollowood, Devon L. | |
dc.creator.author | Honscheid, Klaus | |
dc.creator.author | James, D. J. | |
dc.creator.author | Kuehn, Kyler | |
dc.creator.author | Lahav, Ofer | |
dc.creator.author | Lima, M. | |
dc.creator.author | Maia, Marcio A. G. | |
dc.creator.author | Menanteau, Felipe | |
dc.creator.author | Miquel, R. | |
dc.creator.author | Morgan, R. | |
dc.creator.author | Palmese, Antonella | |
dc.creator.author | Paz-Chinchón, Francisco | |
dc.creator.author | Plazas, Andrés A. | |
dc.creator.author | Sanchez, E. | |
dc.creator.author | Scarpine, V. | |
dc.creator.author | Serrano, S. | |
dc.creator.author | Soares-Santos, Marcelle | |
dc.creator.author | Smith, M. | |
dc.creator.author | Suchyta, E. | |
dc.creator.author | Tarlé, Gregory | |
dc.creator.author | Thomas, D. | |
dc.creator.author | To, Chun-Hao | |
dc.creator.author | Varga, Tamas Norbert | |
dc.creator.author | Weller, Jochen | |
dc.creator.author | Wilkinson, R. D. | |
cristin.unitcode | 185,15,3,0 | |
cristin.unitname | Institutt for teoretisk astrofysikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1996525 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Monthly notices of the Royal Astronomical Society&rft.volume=508&rft.spage=3125&rft.date=2021 | |
dc.identifier.jtitle | Monthly notices of the Royal Astronomical Society | |
dc.identifier.volume | 508 | |
dc.identifier.issue | 3 | |
dc.identifier.startpage | 3125 | |
dc.identifier.endpage | 3165 | |
dc.identifier.doi | https://doi.org/10.1093/mnras/stab2384 | |
dc.identifier.urn | URN:NBN:no-94086 | |
dc.subject.nvi | VDP::Astrofysikk, astronomi: 438 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0035-8711 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/91483/1/stab2384.pdf | |
dc.type.version | PublishedVersion | |
dc.relation.project | NFR/287772 |
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