The Keck/DEIMOS Stellar Archive

This dataset provides radial velocities and equivalent width measurements for individual stars in 78 Milky Way satellite galaxies and globular clusters. The dataset consists of 411 DEIMOS multislit masks taken with the 1200G grating. The catalog data includes 22,339 individual stars, in many cases with multiepoch measurements. The data pipeline and catalog properties are described in detail in Geha et al. 2026. This Contributed Dataset includes access to the reduced 1D spectra and multiepoch measurements.

If you use this data in your publication, please cite Geha et al. 2026.

Download all spectra: wget_deimos_stellar.sh    or   wget_deimos_stellar_ancillary.sh


       
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Please acknowledge the use of KOA by including this text in your publications:

This research has made use of the Keck Observatory Archive (KOA), which is operated by the W. M. Keck Observatory and the NASA Exoplanet Science Institute (NExScI), under contract with the National Aeronautics and Space Administration.

Please also acknowledge the PI(s) of datasets that have been obtained through KOA, and please contact the KOA Help Desk if you publish archival data.

If your research uses data reduced by the DEIMOS, KCWI, MOSFIRE, or NIRES PypeIt DRP, please use the PypeIt Citation.

If your research uses data reduced by the KPF DRP, please use the citation as described in the README.md.

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The Keck Observatory Archive (KOA) is a collaboration between the NASA Exoplanet Science Institute (NExScI) and the W. M. Keck Observatory (WMKO). NExScI is sponsored by NASA's Exoplanet Exploration Program, and operated by the California Institute of Technology in coordination with the Jet Propulsion Laboratory (JPL).

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