DESI 2024 II: Sample Definitions, Characteristics, and Two-point Clustering Statistics
Abstract
We present the samples of galaxies and quasars used for DESI 2024 cosmological analyses, drawn from the DESI Data Release 1 (DR1). We describe the construction of large-scale structure (LSS) catalogs from these samples, which include matched sets of synthetic reference `randoms' and weights that account for variations in the observed density of the samples due to experimental design and varying instrument performance. We detail how we correct for variations in observational completeness, the input `target' densities due to imaging systematics, and the ability to confidently measure redshifts from DESI spectra. We then summarize how remaining uncertainties in the corrections can be translated to systematic uncertainties for particular analyses. We describe the weights added to maximize the signal-to-noise of DESI DR1 2-point clustering measurements. We detail measurement pipelines applied to the LSS catalogs that obtain 2-point clustering measurements in configuration and Fourier space. The resulting 2-point measurements depend on window functions and normalization constraints particular to each sample, and we present the corrections required to match models to the data. We compare the configuration- and Fourier-space 2-point clustering of the data samples to that recovered from simulations of DESI DR1 and find they are, generally, in statistical agreement to within 2\% in the inferred real-space over-density field. The LSS catalogs, 2-point measurements, and their covariance matrices will be released publicly with DESI DR1.
Keywords
Cite
@article{arxiv.2411.12020,
title = {DESI 2024 II: Sample Definitions, Characteristics, and Two-point Clustering Statistics},
author = {DESI Collaboration and A. G. Adame and J. Aguilar and S. Ahlen and S. Alam and D. M. Alexander and M. Alvarez and O. Alves and A. Anand and U. Andrade and E. Armengaud and S. Avila and A. Aviles and H. Awan and S. Bailey and C. Baltay and A. Bault and J. Behera and S. BenZvi and F. Beutler and D. Bianchi and C. Blake and R. Blum and S. Brieden and A. Brodzeller and D. Brooks and Z. Brown and E. Buckley-Geer and E. Burtin and R. Calderon and R. Canning and A. Carnero Rosell and R. Cereskaite and J. L. Cervantes-Cota and S. Chabanier and E. Chaussidon and J. Chaves-Montero and S. Chen and X. Chen and T. Claybaugh and S. Cole and A. Cuceu and T. M. Davis and K. Dawson and A. de la Macorra and A. de Mattia and N. Deiosso and R. Demina and A. Dey and B. Dey and Z. Ding and P. Doel and J. Edelstein and S. Eftekharzadeh and D. J. Eisenstein and A. Elliott and P. Fagrelius and K. Fanning and S. Ferraro and J. Ereza and N. Findlay and B. Flaugher and A. Font-Ribera and D. Forero-Sánchez and J. E. Forero-Romero and C. S. Frenk and C. Garcia-Quintero and E. Gaztañaga and H. Gil-Marín and S. Gontcho A Gontcho and A. X. Gonzalez-Morales and V. Gonzalez-Perez and C. Gordon and D. Green and D. Gruen and R. Gsponer and G. Gutierrez and J. Guy and B. Hadzhiyska and C. Hahn and M. M. S Hanif and H. K. Herrera-Alcantar and K. Honscheid and J. Hou and C. Howlett and D. Huterer and V. Iršič and M. Ishak and S. Juneau and N. G. Karaçaylı and R. Kehoe and S. Kent and D. Kirkby and F. -S. Kitaura and H. Kong and A. Kremin and A. Krolewski and Y. Lai and T. -W. Lan and M. Landriau and D. Lang and J. Lasker and J. M. Le Goff and L. Le Guillou and A. Leauthaud and M. E. Levi and T. S. Li and K. Lodha and C. Magneville and M. Manera and D. Margala and P. Martini and M. Maus and P. McDonald and L. Medina-Varela and A. Meisner and J. Mena-Fernández and R. Miquel and J. Moon and S. Moore and J. Moustakas and N. Mudur and E. Mueller and A. Muñoz-Gutiérrez and A. D. Myers and S. Nadathur and L. Napolitano and R. Neveux and J. A. Newman and N. M. Nguyen and J. Nie and G. Niz and H. E. Noriega and N. Padmanabhan and E. Paillas and N. Palanque-Delabrouille and J. Pan and S. Penmetsa and W. J. Percival and M. M. Pieri and M. Pinon and C. Poppett and A. Porredon and F. Prada and A. Pérez-Fernández and I. Pérez-Ràfols and D. Rabinowitz and A. Raichoor and C. Ramírez-Pérez and S. Ramirez-Solano and M. Rashkovetskyi and C. Ravoux and M. Rezaie and J. Rich and A. Rocher and C. Rockosi and N. A. Roe and A. Rosado-Marin and A. J. Ross and G. Rossi and R. Ruggeri and V. Ruhlmann-Kleider and L. Samushia and E. Sanchez and C. Saulder and E. F. Schlafly and D. Schlegel and D. Scholte and M. Schubnell and H. Seo and R. Sharples and J. Silber and A. Slosar and A. Smith and D. Sprayberry and T. Tan and G. Tarlé and S. Trusov and R. Vaisakh and D. Valcin and F. Valdes and M. Vargas-Magaña and L. Verde and M. Walther and B. Wang and M. S. Wang and B. A. Weaver and N. Weaverdyck and R. H. Wechsler and D. H. Weinberg and M. White and M. J. Wilson and J. Yu and Y. Yu and S. Yuan and C. Yèche and E. A. Zaborowski and P. Zarrouk and H. Zhang and C. Zhao and R. Zhao and R. Zhou and H. Zou},
journal= {arXiv preprint arXiv:2411.12020},
year = {2025}
}
Comments
This DESI Collaboration Key Publication is part of the 2024 publication series using the first year of observations (see https://data.desi.lbl.gov/doc/papers/)