The W. M. Keck Observatory Archive (KOA) serves level 0 (uncalibrated) observations made with the CCD mosaic upgrade to the High Resolution Echelle Spectrograph (HIRES), commissioned on the Keck Telescope in August 2004. The data are validated and prepared for the archive at the W. M. Keck Observatory, and subsequently archived at the Michelson Science Center.

Public access to these data is governed by the data release policy agreed between NASA and the California Association for Research in Astronomy (CARA). Observations supporting Deep Impact and GRB051111 may be accessed from dedicated download pages, as well as through the KOA user interface.

The KOA has inherited the archive ingest and science information system architecture used at the NASA/IPAC Infrared Science Archive (IRSA).

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Please contact KOA Support with questions or problems.