Dark Energy Survey Year 3 results: galaxy clustering and systematics treatment for lens galaxy samples

Rodríguez-Monroy, M.; Weaverdyck, N.; Elvin-Poole, J.; Crocce, M.; Carnero Rosell, A.; Andrade-Oliveira, F.; Avila, S.; Bechtol, K.; Bernstein, G. M.; Blazek, J.; Camacho, H.; Cawthon, R.; De Vicente, J.; DeRose, J.; Dodelson, S.; Everett, S.; Fang, X.; Ferrero, I.; Ferté, A.; Friedrich, O.; Gaztanaga, E.; Giannini, G.; Gruendl, R. A.; Hartley, W. G.; Herner, K.; Huff, E. M.; Jarvis, M.; Krause, E.; MacCrann, N.; Mena-Fernández, J.; Muir, J.; Pandey, S.; Park, Y.; Porredon, A.; Prat, J.; Rosenfeld, R.; Ross, A. J.; Rozo, E.; Rykoff, E. S.; Sanchez, E.; Sanchez Cid, D.; Sevilla-Noarbe, I.; Tabbutt, M.; To, C.; Wagoner, E. L.; Wechsler, R. H.; Aguena, M.; Allam, S.; Amon, A.; Annis, J.; Bacon, D.; Baxter, E.; Bertin, E.; Bhargava, S.; Brooks, D.; Burke, D. L.; Carrasco Kind, M.; Carretero, J.; Castander, F. J.; Choi, A.; Conselice, C.; Costanzi, M.; da Costa, L. N.; Pereira, M. E. S.; Desai, S.; Diehl, H. T.; Flaugher, B.; Fosalba, P.; Frieman, J.; García-Bellido, J.; Giannantonio, T.; Gruen, D.; Gschwend, J.; Gutierrez, G.; Hinton, S. R.; Hollowood, D. L.; Honscheid, K.; Huterer, D.; Jain, B.; James, D. J.; Kuehn, K.; Kuropatkin, N.; Lima, M.; Maia, M. A. G.; March, M.; Marshall, J. L.; Melchior, P.; Menanteau, F.; Miller, C. J.; Miquel, R.; Mohr, J. J.; Morgan, R.; Palmese, A.; Paz-Chinchón, F.; Pieres, A.; Plazas Malagón, A. A.; Roodman, A.; Scarpine, V.; Serrano, S.; Smith, M.; Soares-Santos, M.; Suchyta, E.; Tarle, G.; Thomas, D.; Varga, T. N.

doi:10.1093/mnras/stac104

Title: Dark Energy Survey Year 3 results: galaxy clustering and systematics treatment for lens galaxy samples

Journal Article · Fri Jan 28 00:00:00 EST 2022 · Monthly Notices of the Royal Astronomical Society

DOI:https://doi.org/10.1093/mnras/stac104· OSTI ID:1845160

;

; Elvin-Poole, J.;

;

; Andrade-Oliveira, F.; Avila, S.; Bechtol, K.; Bernstein, G. M.; Blazek, J.; Camacho, H.; Cawthon, R.; De Vicente, J.; DeRose, J.; Dodelson, S.; Everett, S.; Fang, X.; Ferrero, I.; Ferté, A.; Friedrich, O. more »

In this work, we present the galaxy clustering measurements of the two DES lens galaxy samples: a magnitude-limited sample optimized for the measurement of cosmological parameters, maglim, and a sample of luminous red galaxies selected with the redmagic algorithm. maglim/redmagic sample contains over 10 million/2.5 million galaxies and is divided into six/five photometric redshift bins spanning the range z ϵ [0.20, 1.05]/z ϵ [0.15, 0.90]. Both samples cover 4143 $$\deg ^2$$ over which we perform our analysis blind, measuring the angular correlation function with an S/N ~ 63 for both samples. In a companion paper, these measurements of galaxy clustering are combined with the correlation functions of cosmic shear and galaxy–galaxy lensing of each sample to place cosmological constraints with a 3 × 2pt analysis. We conduct a thorough study of the mitigation of systematic effects caused by the spatially varying survey properties and we correct the measurements to remove artificial clustering signals. We employ several decontamination methods with different configurations to ensure the robustness of our corrections and to determine the systematic uncertainty that needs to be considered for the final cosmology analyses. Finally, we validate our fiducial methodology using lognormal mocks, showing that our decontamination procedure induces biases no greater than 0.5σ in the (Ωm, b) plane, where b is the galaxy bias.

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Research Organization:: SLAC National Accelerator Laboratory, Menlo Park, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States); Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: DES Collaboration

Grant/Contract Number:: AC02-07CH11359; AC02-76SF00515; AC05-00OR22725; SC0010118; AC02-05CH11231; SC0019193

OSTI ID:: 1845160

Alternate ID(s):: OSTI ID: 1824180; OSTI ID: 1870811; OSTI ID: 1890306; OSTI ID: 1906919; OSTI ID: 1958528; OSTI ID: 1976145

Report Number(s):: FERMILAB-PUB-=21-255-AE; arXiv:2105.13540

Journal Information:: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Vol. 511 Journal Issue: 2; ISSN 0035-8711

Publisher:: Oxford University PressCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Title: Dark Energy Survey Year 3 results: galaxy clustering and systematics treatment for lens galaxy samples

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