We present two galaxy samples, selected from DESI Legacy Imaging Surveys (LS) DR9, with approximately 20,000 square degrees of coverage and spectroscopic redshift distributions designed for cross-correlations such as with CMB lensing, galaxy lensing, and the Sunyaev-Zel'dovich effect. The first sample is identical to the DESI Luminous Red Galaxy (LRG) sample, and the second sample is an extended LRG sample with 2-3 times the DESI LRG density. We present the improved photometric redshifts, tomographic binning and their spectroscopic redshift distributions and imaging systematics weights, and magnification bias coefficients. The catalogs and related data products will be made publicly available. The cosmological constraints using this sample and Planck lensing maps are presented in a companion paper. We also make public the new set of general-purpose photometric redshifts trained using DESI spectroscopic redshifts, which are used in this work, for all galaxies in LS DR9.
@article{arxiv.2309.06443,
title = {DESI luminous red galaxy samples for cross-correlations},
author = {Rongpu Zhou and Simone Ferraro and Martin White and Joseph DeRose and Noah Sailer and Jessica Aguilar and Steven Ahlen and Stephen Bailey and David Brooks and Todd Claybaugh and Kyle Dawson and Axel de la Macorra and Biprateep Dey and Peter Doel and Andreu Font-Ribera and Jaime E. Forero-Romero and Satya Gontcho A Gontcho and Julien Guy and Anthony Kremin and Andrew Lambert and Laurent Le Guillou and Michael Levi and Christophe Magneville and Marc Manera and Aaron Meisner and Ramon Miquel and John Moustakas and Adam D. Myers and Jeffrey A. Newman and Jundan Nie and Will Percival and Mehdi Rezaie and Graziano Rossi and Eusebio Sanchez and David Schlegel and Michael Schubnell and Hee-Jong Seo and Gregory Tarlé and Zhimin Zhou},
journal= {arXiv preprint arXiv:2309.06443},
year = {2023}
}
Comments
Matches the journal version. Associated data files: https://data.desi.lbl.gov/public/papers/c3/lrg_xcorr_2023/. General-purpose photo-z catalogs: https://www.legacysurvey.org/dr9/files/#photo-z-sweeps-9-1-photo-z-sweep-brickmin-brickmax-pz-fits