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Detection of the significant impact of source clustering on higher-order statistics with DES Year 3 weak gravitational lensing data

Detection of the significant impact of source clustering on higher-order statistics with DES Year 3 weak gravitational lensing data
Detection of the significant impact of source clustering on higher-order statistics with DES Year 3 weak gravitational lensing data
We measure the impact of source galaxy clustering on higher order summary statistics of weak gravitational lensing data. By comparing simulated data with galaxies that either trace or do not trace the underlying density field, we show that this effect can exceed measurement uncertainties for common higher order statistics for certain analysis choices. We evaluate the impact on different weak lensing observables, finding that third moments and wavelet phase harmonics are more affected than peak count statistics. Using Dark Energy Survey (DES) Year 3 (Y3) data, we construct null tests for the source-clustering-free case, finding a p-value of p = 4 × 10−3 (2.6σ) using third-order map moments and p = 3 × 10−11 (6.5σ) using wavelet phase harmonics. The impact of source clustering on cosmological inference can be either included in the model or minimized through ad hoc procedures (e.g. scale cuts). We verify that the procedures adopted in existing DES Y3 cosmological analyses were sufficient to render this effect negligible. Failing to account for source clustering can significantly impact cosmological inference from higher order gravitational lensing statistics, e.g. higher order N-point functions, wavelet-moment observables, and deep learning or field-level summary statistics of weak lensing maps.
astro-ph.CO, cosmology: observations
1745-3925
L115-L121
Gatti, M.
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Jeffrey, N.
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Whiteway, L.
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Ajani, V.
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Kacprzak, T.
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Zürcher, D.
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Chang, C.
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Jain, B.
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Blazek, J.
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Krause, E.
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Alarcon, A.
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Amon, A.
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Bechtol, K.
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Becker, M.
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Bernstein, G.
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Campos, A.
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Chen, R.
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Choi, A.
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Davis, C.
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Derose, J.
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Diehl, H.T.
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Dodelson, S.
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Doux, C.
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Eckert, K.
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Elvin-Poole, J.
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Everett, S.
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Ferte, A.
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Gruen, D.
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Gruendl, R.
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Harrison, I.
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Hartley, W.G.
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Herner, K.
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Huff, E.M.
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Jarvis, M.
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Kuropatkin, N.
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Leget, P.F.
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MacCrann, N.
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McCullough, J.
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Myles, J.
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Navarro-Alsina, A.
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Pandey, S.
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Prat, J.
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Raveri, M.
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Rollins, R.P.
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Roodman, A.
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Sanchez, C.
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Secco, L.F.
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Sevilla-Noarbe, I.
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Sheldon, E.
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Shin, T.
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Troxel, M.
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Tutusaus, I.
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Varga, T.N.
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Yanny, B.
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Zhang, Y.
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Zuntz, J.
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Allam, S.S.
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Alves, O.
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Aguena, M.
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Bacon, D.
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Bertin, E.
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Brooks, D.
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Burke, D.L.
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Carnero Rosell, A.
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Carretero, J.
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Cawthon, R.
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da Costa, L.N.
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Davis, T.M.
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De Vicente, J.
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Desai, S.
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Doel, P.
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Garcia-Bellido, J.
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Giannini, G.
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Gutierrez, G.
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Ferrero, I.
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Frieman, J.
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Hinton, S.R.
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Hollowood, D.L.
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Honscheid, K.
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James, D.J.
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Kuehn, K.
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Lahav, O.
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Marshall, J.L.
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Mena-Fernández, J.
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Miquel, R.
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Ogando, R.L.C.
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Palmese, A.
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Pereira, M.E.S.
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Plazas Malagón, A.A.
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Rodriguez-Monroy, M.
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Samuroff, S.
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Sanchez, E.
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Schubnell, M.
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Smith, Mathew
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Sobreira, F.
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Suchyta, E.
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Swanson, M.E.C.
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Tarle, G.
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Weaverdyck, N.
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Wiseman, P.
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The Dark Energy Survey Collaboration
Gatti, M.
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Jeffrey, N.
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Whiteway, L.
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Ajani, V.
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Kacprzak, T.
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Zürcher, D.
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Chang, C.
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Jain, B.
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Blazek, J.
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Krause, E.
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Alarcon, A.
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Amon, A.
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Bechtol, K.
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Becker, M.
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Bernstein, G.
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Campos, A.
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Chen, R.
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Choi, A.
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Davis, C.
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Derose, J.
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Diehl, H.T.
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Dodelson, S.
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Everett, S.
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Ferte, A.
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Gruen, D.
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Gruendl, R.
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Harrison, I.
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Hartley, W.G.
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Jarvis, M.
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MacCrann, N.
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McCullough, J.
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Myles, J.
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Navarro-Alsina, A.
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Pandey, S.
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Prat, J.
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Raveri, M.
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Rollins, R.P.
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Sheldon, E.
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Shin, T.
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Troxel, M.
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Tutusaus, I.
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Varga, T.N.
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Yanny, B.
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Yin, B.
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Zhang, Y.
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Zuntz, J.
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Allam, S.S.
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Alves, O.
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Aguena, M.
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Bacon, D.
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Bertin, E.
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Brooks, D.
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Burke, D.L.
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Carnero Rosell, A.
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Carretero, J.
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Cawthon, R.
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da Costa, L.N.
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Davis, T.M.
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De Vicente, J.
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Desai, S.
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Doel, P.
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Garcia-Bellido, J.
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Giannini, G.
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Gutierrez, G.
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Ferrero, I.
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Frieman, J.
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Hinton, S.R.
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Honscheid, K.
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James, D.J.
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Kuehn, K.
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Lahav, O.
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Marshall, J.L.
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Mena-Fernández, J.
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Miquel, R.
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Ogando, R.L.C.
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Palmese, A.
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Pereira, M.E.S.
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Plazas Malagón, A.A.
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Samuroff, S.
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Sanchez, E.
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Schubnell, M.
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Smith, Mathew
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Sobreira, F.
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Suchyta, E.
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Swanson, M.E.C.
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Tarle, G.
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Weaverdyck, N.
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Wiseman, P.
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Sheldon, E., Shin, T., Troxel, M., Tutusaus, I., Varga, T.N., Yanny, B., Yin, B., Zhang, Y., Zuntz, J., Allam, S.S., Alves, O., Aguena, M., Bacon, D., Bertin, E., Brooks, D., Burke, D.L., Carnero Rosell, A., Carretero, J., Cawthon, R., da Costa, L.N., Davis, T.M., De Vicente, J., Desai, S., Doel, P., Garcia-Bellido, J., Giannini, G., Gutierrez, G., Ferrero, I., Frieman, J., Hinton, S.R., Hollowood, D.L., Honscheid, K., James, D.J., Kuehn, K., Lahav, O., Marshall, J.L., Mena-Fernández, J., Miquel, R., Ogando, R.L.C., Palmese, A., Pereira, M.E.S., Plazas Malagón, A.A., Rodriguez-Monroy, M., Samuroff, S., Sanchez, E., Schubnell, M., Smith, Mathew, Sobreira, F., Suchyta, E., Swanson, M.E.C., Tarle, G., Weaverdyck, N. and Wiseman, P. , The Dark Energy Survey Collaboration (2024) Detection of the significant impact of source clustering on higher-order statistics with DES Year 3 weak gravitational lensing data. Monthly Notices of the Royal Astronomical Society: Letters, 527 (1), L115-L121. (doi:10.1093/mnrasl/slad143).

Record type: Article

Abstract

We measure the impact of source galaxy clustering on higher order summary statistics of weak gravitational lensing data. By comparing simulated data with galaxies that either trace or do not trace the underlying density field, we show that this effect can exceed measurement uncertainties for common higher order statistics for certain analysis choices. We evaluate the impact on different weak lensing observables, finding that third moments and wavelet phase harmonics are more affected than peak count statistics. Using Dark Energy Survey (DES) Year 3 (Y3) data, we construct null tests for the source-clustering-free case, finding a p-value of p = 4 × 10−3 (2.6σ) using third-order map moments and p = 3 × 10−11 (6.5σ) using wavelet phase harmonics. The impact of source clustering on cosmological inference can be either included in the model or minimized through ad hoc procedures (e.g. scale cuts). We verify that the procedures adopted in existing DES Y3 cosmological analyses were sufficient to render this effect negligible. Failing to account for source clustering can significantly impact cosmological inference from higher order gravitational lensing statistics, e.g. higher order N-point functions, wavelet-moment observables, and deep learning or field-level summary statistics of weak lensing maps.

This record has no associated files available for download.

More information

Accepted/In Press date: 2 October 2023
e-pub ahead of print date: 10 October 2023
Published date: 1 January 2024
Additional Information: Publisher Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
Keywords: astro-ph.CO, cosmology: observations

Identifiers

Local EPrints ID: 484740
URI: http://eprints.soton.ac.uk/id/eprint/484740
DOI: doi:10.1093/mnrasl/slad143
ISSN: 1745-3925
PURE UUID: faf7e038-2cd6-40d9-ad32-e77d860f1390
ORCID for Mathew Smith: ORCID iD orcid.org/0000-0002-3321-1432
ORCID for P. Wiseman: ORCID iD orcid.org/0000-0002-3073-1512

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Date deposited: 20 Nov 2023 18:01
Last modified: 12 Nov 2024 02:57

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Contributors

Author: M. Gatti
Author: N. Jeffrey
Author: L. Whiteway
Author: V. Ajani
Author: T. Kacprzak
Author: D. Zürcher
Author: C. Chang
Author: B. Jain
Author: J. Blazek
Author: E. Krause
Author: A. Alarcon
Author: A. Amon
Author: K. Bechtol
Author: M. Becker
Author: G. Bernstein
Author: A. Campos
Author: R. Chen
Author: A. Choi
Author: C. Davis
Author: J. Derose
Author: H.T. Diehl
Author: S. Dodelson
Author: C. Doux
Author: K. Eckert
Author: J. Elvin-Poole
Author: S. Everett
Author: A. Ferte
Author: D. Gruen
Author: R. Gruendl
Author: I. Harrison
Author: W.G. Hartley
Author: K. Herner
Author: E.M. Huff
Author: M. Jarvis
Author: N. Kuropatkin
Author: P.F. Leget
Author: N. MacCrann
Author: J. McCullough
Author: J. Myles
Author: A. Navarro-Alsina
Author: S. Pandey
Author: J. Prat
Author: M. Raveri
Author: R.P. Rollins
Author: A. Roodman
Author: C. Sanchez
Author: L.F. Secco
Author: I. Sevilla-Noarbe
Author: E. Sheldon
Author: T. Shin
Author: M. Troxel
Author: I. Tutusaus
Author: T.N. Varga
Author: B. Yanny
Author: B. Yin
Author: Y. Zhang
Author: J. Zuntz
Author: S.S. Allam
Author: O. Alves
Author: M. Aguena
Author: D. Bacon
Author: E. Bertin
Author: D. Brooks
Author: D.L. Burke
Author: A. Carnero Rosell
Author: J. Carretero
Author: R. Cawthon
Author: L.N. da Costa
Author: T.M. Davis
Author: J. De Vicente
Author: S. Desai
Author: P. Doel
Author: J. Garcia-Bellido
Author: G. Giannini
Author: G. Gutierrez
Author: I. Ferrero
Author: J. Frieman
Author: S.R. Hinton
Author: D.L. Hollowood
Author: K. Honscheid
Author: D.J. James
Author: K. Kuehn
Author: O. Lahav
Author: J.L. Marshall
Author: J. Mena-Fernández
Author: R. Miquel
Author: R.L.C. Ogando
Author: A. Palmese
Author: M.E.S. Pereira
Author: A.A. Plazas Malagón
Author: M. Rodriguez-Monroy
Author: S. Samuroff
Author: E. Sanchez
Author: M. Schubnell
Author: Mathew Smith ORCID iD
Author: F. Sobreira
Author: E. Suchyta
Author: M.E.C. Swanson
Author: G. Tarle
Author: N. Weaverdyck
Author: P. Wiseman ORCID iD
Corporate Author: The Dark Energy Survey Collaboration

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