The Early Data Release of the Dark Energy Spectroscopic Instrument
A. G. Adame, J. Aguilar, S. P. Ahlen, Shadab Alam, G. Aldering, D. M. Alexander, R. Alfarsy, Carlos Allende Prieto, Marcelo A. Alvarez, O. Alves, Abhijeet Anand, F. Andrade-Oliveira, E. Armengaud, J. Asorey, S. Avila, Alejandro Avilés, S. Bailey, A. Balaguera-Antolínez, O. Ballester, C. Baltay, A. Bault, J. Bautista, J. Behera, S. F. Beltran, S. BenZvi, Leandro Beraldo e Silva, J. R. Bermejo-Climent, A. Berti, R. Besuner, Florian Beutler, D. Bianchi, Chris Blake, R. Blum, A. S. Bolton, S. Brieden, A. Brodzeller, D. Brooks, Zachery Brown, E. Buckley-Geer, E. Burtin, L. Cabayol-Garcia, Zheng Cai, R. Canning, L. Cardiel-Sas, A. Carnero Rosell, F. J. Castander, Jorge L. Cervantes–Cota, Solène Chabanier, E. Chaussidon, J. Chaves-Montero, S. Chen, Xinyi Chen, C. Chuang, T. Claybaugh, Shaun Cole, Andrew P. Cooper, A. Cuceu, T. M. Davis, Kyle Dawson, Roger de Belsunce, R. de la Cruz, Axel de la Macorra, J. Della Costa, Arnaud de Mattia, R. Demina, U Demirbozan, J. DeRose, Arjun Dey, Biprateep Dey, G. Dhungana, J. Ding, Z. Ding, P. Doel, Rajkumar Doshi, Kelly A. Douglass, A. Edge, Sarah Eftekharzadeh, D. J. Eisenstein, Ann Elliott, J. Ereza, S. Escoffier, P. Fagrelius, Xiaohui Fan, K. Fanning, Victoria A. Fawcett, S. Ferraro, B. Flaugher, Andreu Font-Ribera, J. E. Forero-Romero, D. Forero-Sánchez, Carlos S. Frenk, B. T. Gänsicke, Luz Ángela García, J. García-Bellido, C. García-Quintero, L. H. Garrison, Héctor Gil-Marín, J. Golden-Marx, Satya Gontcho A Gontcho, A. X. Gonzalez-Morales
Abstract
Abstract The Dark Energy Spectroscopic Instrument (DESI) completed its 5 month Survey Validation in 2021 May. Spectra of stellar and extragalactic targets from Survey Validation constitute the first major data sample from the DESI survey. This paper describes the public release of those spectra, the catalogs of derived properties, and the intermediate data products. In total, the public release includes good-quality spectral information from 466,447 objects targeted as part of the Milky Way Survey, 428,758 as part of the Bright Galaxy Survey, 227,318 as part of the Luminous Red Galaxy sample, 437,664 as part of the Emission Line Galaxy sample, and 76,079 as part of the Quasar sample. In addition, the release includes spectral information from 137,148 objects that expand the scope beyond the primary samples as part of a series of secondary programs. Here, we describe the spectral data, data quality, data products, Large-Scale Structure science catalogs, access to the data, and references that provide relevant background to using these spectra.