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 DESI’s public website desi.lbl.gov.

The DESI Early Data Release (EDR) is now available! EDR contains spectra for 1.8 million unique targets from Survey Validation observations taken from December 2020 through June 2021.

This visualization of data from the One-Percent Survey, part of the Early Data Release, shows a map of ~700,000 objects that covers roughly 1% of the total volume DESI will study.
Credit: David Kirkby / DESI collaboration

For more information about DESI data

• What data are available?
• Where can I get the data?
• How are the data organized?
• What is the data model (format) of the files?
• Where can I find tutorials on using the data?
• Glossary
• Value-added catalogs
• Technical papers
• Data license and acknowledgments

© 2023 DESI Collaboration. All rights reserved.