DESI Data Documentation¶

This site documents the data available from the the Dark Energy Spectroscopic Instrument (DESI), a 5-year spectroscopic redshift survey observing millions of galaxies, quasars, and stars. For information about DESI science results, the instrument, and the collaboration, see the DESI public website, www.desi.lbl.gov.

Recent Highlights¶

DESI Data Release 1 (DR1) is now available! DR1 contains spectra for more than 18 million unique targets from Main Survey observations taken between May 2021 and June 2022.
DESI DR2 Cosmology Results are now available including updated results based upon Lyman-alpha and galaxy BAO measurements using data observed May 2021 until April 2024.

Main Survey

This visualization is a map of ~1 million DESI Main Survey objects from a 80°x5° thin wedge near the Equator (155°<RA<235° and -1°<DEC<4°), covering ~1% of the full sky.
Credit: David Kirkby / DESI collaboration

Getting Started Quickly¶

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