Keck Observatory Archive

Scheduled Infrastructure Maintenance

KOA is currently undergoing scheduled infrastructure maintenance. Some services may be temporarily altered or unavailable while we complete the work. Normal service will resume as soon as the work is complete.

Services that remain fully available:

KOA Search Form — standard archive queries and data retrieval

Services temporarily affected:

Data Discovery Service (DDS) — under maintenance
KOA User Guide — under maintenance (includes PyKOA documentation, instrument reference pages)
Contributed Datasets — under maintenance

For urgent assistance or questions, please contact the KOA Helpdesk.

Thank you for your patience.

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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. Privacy Policy Image Use Policy 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). KOA WMKO Caltech IPAC: W. M. Keck Observatory: NExScI: