The Compilation and Validation of the Spectroscopic Redshift Catalogs for the DESI-COSMOS and DESI-XMM-LSS Fields

作者：J Ratajczak, Kyle Dawson, N Weaverdyck, J. Aguilar, S. P. Ahlen, E. Armengaud, S. Bailey, D. Bianchi, Diana Blanco, A. Brodzeller, D. Brooks, F.J Castander, T. Claybaugh, Andrei Cuceu, Axel de la Macorra, Arjun Dey, Biprateep Dey, P. Doel, Andreu Font-Ribera, J. E. Forero-Romero, E. Gaztañaga, Satya Gontcho A Gontcho, G Gutierrez, J. Guy, T. Hagen, H. K. Herrera-Alcantar, K Honscheid, Dragan Huterer, Mustapha Ishak, J. Jimenez, R. Joyce, S. Juneau, R. Kehoe, D. Kirkby, Theodore Kisner, S. E. Koposov, A. Kremin, O. Lahav, Adam Lambert, C. Lamman, Martin Landriau, L. Le Guillou, Alexie Leauthaud, J. Lee, M. E. Levi, Q. Li, I Longhurst, Yifei Luo, Marc Manera, Paul Martini, J. McCullough, Aaron Meisner, R. Miquel, John Moustakas, S. Nadathur, J. A. Newman, N. Palanque‐Delabrouille, W. J. Percival, Claire Poppett, Francisco Prada, Ignasi Pérez-Ràfols, Anand Raichoor, C. Ravoux, G. Rossi, Y. Salcedo Hernandez, E. Sánchez, Christoph Saulder, David J. Schlegel, M. Schubnell, Hee‐Jong Seo, David Sprayberry, G. Tarlé, B. A. Weaver, R. H. Wechsler, Martin White, Rongpu Zhou, Hu Zou · 发表于：The Astronomical Journal · 年份：2026 · DOI：10.3847/1538-3881/ae1fde · 被引用次数：5 · 研究领域：Astronomy and Astrophysical Research、Adaptive optics and wavefront sensing、Astronomical Observations and Instrumentation

Abstract Over several dedicated programs that include targets beyond the main cosmological samples, the Dark Energy Spectroscopic Instrument collected spectra for 304,970 unique objects in two fields centered on the COSMOS and XMM-LSS fields. In this work, we develop spectroscopic redshift robustness criteria for those spectra, validate these criteria using visual inspection, and provide two custom value-added catalogs with our redshift characterizations. With these criteria, we reliably classify 212,935 galaxies below z < 1.6, 9713 quasars, and 35,222 stars. The resulting catalogs achieve a redshift purity exceeding 99.4% across all galaxy samples. As a critical element in characterizing the selection function, we provide the description of 70 different algorithms that were used to select these targets from imaging data. To facilitate joint imaging/spectroscopic analyses, we provide row-matched photometry from the Dark Energy Camera, Hyper-Suprime Cam, and public COSMOS2020 photometric catalogs. Finally, we demonstrate example applications of these large catalogs to photometric redshift estimation, cluster finding, and completeness studies.