Data Release 1 of the Dark Energy Spectroscopic Instrument

Abstract

In 2021 May the Dark Energy Spectroscopic Instrument (DESI) collaboration began a 5-year spectroscopic redshift survey to produce a detailed map of the evolving three-dimensional structure of the universe between $z=0$ and $z\approx 4$. DESI's principle 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 Data Release 1 (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 was previously made public in the DESI Early Data Release. The DR1 main survey includes high-confidence redshifts for 18.7M objects, of which 13.1M are spectroscopically classified as galaxies, 1.6M as quasars, and 4M as stars, making DR1 the largest sample of extragalactic redshifts ever assembled. We summarize the DR1 observations, the spectroscopic data-reduction pipeline and data products, large-scale structure catalogs, value-added catalogs, and describe how to access and interact with the data. In addition to fulfilling its core cosmological objectives with unprecedented precision, we expect DR1 to enable a wide range of transformational astrophysical studies and discoveries.

64 pages, 7 figures, 15 tables, accepted to The Astronomical Journal

Cited by in corpus (13)

• Exploring the interaction between the MW and LMC with a large sample of blue horizontal branch stars from the DESI survey
• Cosmology from Planck CMB Lensing and DESI DR1 Quasar Tomography
• Nearby stellar substructures in the Galactic halo from DESI Milky Way Survey Year 1 Data Release
• The Impact of ${\Omega }_{m0}$ Prior Bias on Cosmological Parameter Estimation: Reconciling DESI DR2 BAO and Pantheon+ SNe Data Combination Results
• Euclid: The potential of slitless infrared spectroscopy: A z=5.4 quasar and new ultracool dwarfs
• The 4MOST-Cosmology Redshift Survey: Target Selection of Bright Galaxies and Luminous Red Galaxies
• Discovery of an icy and nitrogen-rich extrasolar planetesimal
• Scatter in the star formation rate-halo mass relation: secondary bias and its impact on line-intensity mapping
• Pulsar B1237+25 Aberration/Retardation Analysis from Decimeter to Decameter Wavelength: Challenge to "Radius-to-Frequency Mapping"
• Revisiting the X-ray-to-UV relation of Quasars in the era of all-sky surveys
• Searching for Type Ia Supernovae in the Dark Energy Spectroscopic Instrument
• The GLEAM 4-Jy (G4Jy) Sample: IV. Multiwavelength data and analysis
• Early results in the search for extreme coronal line emitters with the Dark Energy Spectroscopic Instrument