articleThe Astronomical JournalApr 13, 2026GOLD OA

Data Release 1 of the Dark Energy Spectroscopic Instrument

Commissariat à l'Énergie Atomique et aux Énergies Alternatives · Université Paris-Saclay · +116 more institutions

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Abstract

Abstract In 2021 May the Dark Energy Spectroscopic Instrument (DESI) collaboration began a 5 yr spectroscopic redshift survey to produce a detailed map of the evolving three-dimensional structure of the Universe between z = 0 and z ≈ 4. DESI’s principal scientific objectives are to place precise constraints on the equation of state of dark energy, the gravitationally driven growth of large-scale structure, and the sum of the neutrino masses, and to explore the observational signatures of primordial inflation. We present DESI DR1, which consists of all data acquired during the first 13 months of the DESI main survey, as well as a uniform reprocessing of the DESI Survey Validation data, which were previously…

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