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Dark Energy Survey Year 6 Results: Cell-based Coadds and Metadetection Weak Lensing Shape Catalogue

Fuente: arXiv

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Autori principali:	Yamamoto, M., Becker, M. R., Sheldon, E., Jarvis, M., Gruendl, R. A., Menanteau, F., Rykoff, E. S., Mau, S., Schutt, T., Gatti, M., Troxel, M. A., Amon, A., Anbajagane, D., Bernstein, G. M., Gruen, D., Huff, E. M., Tabbutt, M., Tong, A., Yanny, B., Abbott, T. M. C., Aguena, M., Alarcon, A., Andrade-Oliveira, F., Bechtol, K., Blazek, J., Brooks, D., Rosell, A. Carnero, Carretero, J., Chang, C., Choi, A., Costanzi, M., Crocce, M., da Costa, L. N., Davis, T. M., De Vicente, J., Desai, S., Diehl, H. T., Dodelson, S., Doel, P., Doux, C., Drlica-Wagner, A., Ferté, A., Flaugher, B., Frieman, J., García-Bellido, J., Gaztanaga, E., Giannini, G., Gutierrez, G., Hartley, W. G., Herner, K., Hinton, S. R., Hollowood, D. L., Honscheid, K., Huterer, D., Krause, E., Kuehn, K., Lahav, O., Lima, M., Marshall, J. L., Mena-Fernández, J., Miquel, R., Mohr, J. J., Muir, J., Myles, J., Ogando, R. L. C., Pieres, A., Malagón, A. A. Plazas, Porredon, A., Prat, J., Raveri, M., Rodriguez-Monroy, M., Roodman, A., Samuroff, S., Sanchez, E., Cid, D. Sanchez, Scarpine, V., Sevilla-Noarbe, I., Smith, M., Suchyta, E., Tarle, G., Vikram, V., Weaverdyck, N., Wiseman, P., Zhang, Y.
Natura:	Preprint
Pubblicazione:	2025
Soggetti:	Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics
Accesso online:	Acceder al recurso
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_version_	1866912894666407936
author	Yamamoto, M. Becker, M. R. Sheldon, E. Jarvis, M. Gruendl, R. A. Menanteau, F. Rykoff, E. S. Mau, S. Schutt, T. Gatti, M. Troxel, M. A. Amon, A. Anbajagane, D. Bernstein, G. M. Gruen, D. Huff, E. M. Tabbutt, M. Tong, A. Yanny, B. Abbott, T. M. C. Aguena, M. Alarcon, A. Andrade-Oliveira, F. Bechtol, K. Blazek, J. Brooks, D. Rosell, A. Carnero Carretero, J. Chang, C. Choi, A. Costanzi, M. Crocce, M. da Costa, L. N. Davis, T. M. De Vicente, J. Desai, S. Diehl, H. T. Dodelson, S. Doel, P. Doux, C. Drlica-Wagner, A. Ferté, A. Flaugher, B. Frieman, J. García-Bellido, J. Gaztanaga, E. Giannini, G. Gutierrez, G. Hartley, W. G. Herner, K. Hinton, S. R. Hollowood, D. L. Honscheid, K. Huterer, D. Krause, E. Kuehn, K. Lahav, O. Lima, M. Marshall, J. L. Mena-Fernández, J. Miquel, R. Mohr, J. J. Muir, J. Myles, J. Ogando, R. L. C. Pieres, A. Malagón, A. A. Plazas Porredon, A. Prat, J. Raveri, M. Rodriguez-Monroy, M. Roodman, A. Samuroff, S. Sanchez, E. Cid, D. Sanchez Scarpine, V. Sevilla-Noarbe, I. Smith, M. Suchyta, E. Tarle, G. Vikram, V. Weaverdyck, N. Wiseman, P. Zhang, Y.
author_facet	Yamamoto, M. Becker, M. R. Sheldon, E. Jarvis, M. Gruendl, R. A. Menanteau, F. Rykoff, E. S. Mau, S. Schutt, T. Gatti, M. Troxel, M. A. Amon, A. Anbajagane, D. Bernstein, G. M. Gruen, D. Huff, E. M. Tabbutt, M. Tong, A. Yanny, B. Abbott, T. M. C. Aguena, M. Alarcon, A. Andrade-Oliveira, F. Bechtol, K. Blazek, J. Brooks, D. Rosell, A. Carnero Carretero, J. Chang, C. Choi, A. Costanzi, M. Crocce, M. da Costa, L. N. Davis, T. M. De Vicente, J. Desai, S. Diehl, H. T. Dodelson, S. Doel, P. Doux, C. Drlica-Wagner, A. Ferté, A. Flaugher, B. Frieman, J. García-Bellido, J. Gaztanaga, E. Giannini, G. Gutierrez, G. Hartley, W. G. Herner, K. Hinton, S. R. Hollowood, D. L. Honscheid, K. Huterer, D. Krause, E. Kuehn, K. Lahav, O. Lima, M. Marshall, J. L. Mena-Fernández, J. Miquel, R. Mohr, J. J. Muir, J. Myles, J. Ogando, R. L. C. Pieres, A. Malagón, A. A. Plazas Porredon, A. Prat, J. Raveri, M. Rodriguez-Monroy, M. Roodman, A. Samuroff, S. Sanchez, E. Cid, D. Sanchez Scarpine, V. Sevilla-Noarbe, I. Smith, M. Suchyta, E. Tarle, G. Vikram, V. Weaverdyck, N. Wiseman, P. Zhang, Y.
contents	We present the Metadetection weak lensing galaxy shape catalogue from the six-year Dark Energy Survey (DES Y6) imaging data. This dataset is the final release from DES, spanning 4422 deg$^2$ of the southern sky. We describe how the catalogue was constructed, including the two new major processing steps, cell-based image coaddition and shear measurements with Metadetection. The DES Y6 Metadetection weak lensing shape catalogue consists of 151,922,791 galaxies detected over riz bands, with an effective number density of $n_{\rm eff}$ =8.22 galaxies per arcmin$^2$ and shape noise of $σ_e$ = 0.29. We carry out a suite of validation tests on the catalogue, including testing for PSF leakage, testing for the impact of PSF modeling errors, and testing the correlation of the shear measurements with galaxy, PSF, and survey properties. In addition to demonstrating that our catalogue is robust for weak lensing science, we use the DES Y6 image simulation suite (Mau, Becker et al. 2025) to estimate the overall multiplicative shear bias of our shear measurement pipeline. We find no detectable multiplicative bias at the roughly half-percent level, with m = (3.4 $\pm$ 6.1) x $10^{-3}$, at 3$σ$ uncertainty. This is the first time both cell-based coaddition and Metadetection algorithms are applied to observational data, paving the way to the Stage-IV weak lensing surveys.
format	Preprint
id	arxiv_https___arxiv_org_abs_2501_05665
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Dark Energy Survey Year 6 Results: Cell-based Coadds and Metadetection Weak Lensing Shape Catalogue Yamamoto, M. Becker, M. R. Sheldon, E. Jarvis, M. Gruendl, R. A. Menanteau, F. Rykoff, E. S. Mau, S. Schutt, T. Gatti, M. Troxel, M. A. Amon, A. Anbajagane, D. Bernstein, G. M. Gruen, D. Huff, E. M. Tabbutt, M. Tong, A. Yanny, B. Abbott, T. M. C. Aguena, M. Alarcon, A. Andrade-Oliveira, F. Bechtol, K. Blazek, J. Brooks, D. Rosell, A. Carnero Carretero, J. Chang, C. Choi, A. Costanzi, M. Crocce, M. da Costa, L. N. Davis, T. M. De Vicente, J. Desai, S. Diehl, H. T. Dodelson, S. Doel, P. Doux, C. Drlica-Wagner, A. Ferté, A. Flaugher, B. Frieman, J. García-Bellido, J. Gaztanaga, E. Giannini, G. Gutierrez, G. Hartley, W. G. Herner, K. Hinton, S. R. Hollowood, D. L. Honscheid, K. Huterer, D. Krause, E. Kuehn, K. Lahav, O. Lima, M. Marshall, J. L. Mena-Fernández, J. Miquel, R. Mohr, J. J. Muir, J. Myles, J. Ogando, R. L. C. Pieres, A. Malagón, A. A. Plazas Porredon, A. Prat, J. Raveri, M. Rodriguez-Monroy, M. Roodman, A. Samuroff, S. Sanchez, E. Cid, D. Sanchez Scarpine, V. Sevilla-Noarbe, I. Smith, M. Suchyta, E. Tarle, G. Vikram, V. Weaverdyck, N. Wiseman, P. Zhang, Y. Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics We present the Metadetection weak lensing galaxy shape catalogue from the six-year Dark Energy Survey (DES Y6) imaging data. This dataset is the final release from DES, spanning 4422 deg$^2$ of the southern sky. We describe how the catalogue was constructed, including the two new major processing steps, cell-based image coaddition and shear measurements with Metadetection. The DES Y6 Metadetection weak lensing shape catalogue consists of 151,922,791 galaxies detected over riz bands, with an effective number density of $n_{\rm eff}$ =8.22 galaxies per arcmin$^2$ and shape noise of $σ_e$ = 0.29. We carry out a suite of validation tests on the catalogue, including testing for PSF leakage, testing for the impact of PSF modeling errors, and testing the correlation of the shear measurements with galaxy, PSF, and survey properties. In addition to demonstrating that our catalogue is robust for weak lensing science, we use the DES Y6 image simulation suite (Mau, Becker et al. 2025) to estimate the overall multiplicative shear bias of our shear measurement pipeline. We find no detectable multiplicative bias at the roughly half-percent level, with m = (3.4 $\pm$ 6.1) x $10^{-3}$, at 3$σ$ uncertainty. This is the first time both cell-based coaddition and Metadetection algorithms are applied to observational data, paving the way to the Stage-IV weak lensing surveys.
title	Dark Energy Survey Year 6 Results: Cell-based Coadds and Metadetection Weak Lensing Shape Catalogue
topic	Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics
url	https://arxiv.org/abs/2501.05665