Skip to content

DESI Data Releases

Spectroscopic Data Releases

Data Release 1 (DR1) — March 19, 2025

Data: https://data.desi.lbl.gov/public/dr1
Paper: DESI Collaboration et al. (2025), Data Release 1 of the Dark Energy Spectroscopic Instrument
Overview: DR1 Documentation

Data Release 1 (DR1) is the first release of DESI Main Survey data, including 18.7 million new spectra observed from May 2021 through June 2022. It also includes a reprocessing of Survey Validation data previously released with EDR using the latest algorithms and calibrations.

Early Data Release (EDR) — June 13, 2023

Data: https://data.desi.lbl.gov/public/edr
Paper: DESI Collaboration et al. (2024), The Early Data Release of the Dark Energy Spectroscopic Instrument
Overview: EDR Documentation

The DESI Early Data Release includes spectra for 1.8 million unique targets from Survey Validation observations taken from December 2020 through June 2021, as well as a few commissioning and special tiles observered during the same time period. Read more…

Note

DESI data are released under the Creative Commons Attribution 4.0 International License (CC BY 4.0). Use of DESI data requires including the citation and acknowledgment text given on the Data License and Acknowledgments pages.

Targeting Data Releases

Early Target Selection (ETS)

Data URL: https://data.desi.lbl.gov/public/ets

The Early Target Selection (ETS) release includes the output of desitarget algorithms applied to DESI Legacy Imaging Surveys DR9 photometry to select the targets observed for DESI Survey Validation and Main Survey observations.

Other DESI Data

Education and Public Outreach (EPO)

Data URL: https://data.desi.lbl.gov/public/epo

Example DESI data and visualizations used for Education and Public Outreach (EPO).

Transients

Data URL: https://data.desi.lbl.gov/public/transients

Ad-hoc releases of (meta)data for DESI observations of transients. This directory is largely deprecated in favor of posting to Zenodo, but it could have future datasets that are larger than viable for Zenodo.

Data Supporting Published Papers

Data URL: https://data.desi.lbl.gov/public/papers
Zenodo: https://zenodo.org/communities/desi-pub
Value Added Catalogs: VAC documentation page

Supporting data for individual published papers are available via Zenodo or https://data.desi.lbl.gov/public/papers when the supporting dataset is too large for Zenodo:

Papers may also release their supporting data as a Value Added Catalog accompanying a data release.