Keck Cosmic Web Imager Data Reduction Pipeline

KCWI_DRP is a the official data reduction pipeline (DRP) for the Keck Cosmic Web Imager. This DRP has been developed by the KCWI team at Caltech in collaboration with the W. M. Keck Observatory Scientific Software Group.

Release 1.1

We are excited to announce the release version of 1.1.0 of the KCWI DRP, now with support for both the red and blue sides of the instrument. Just like version 1.0, this pipeline is based off of the original KCWIdrp IDL pipeline developed by the KCWI team at Caltech, and this pipeline continues to be the only pipeline supported by the W. M. Keck Observatory.


  • Simplified installation via pip and conda environment

  • Vacuum to air and heliocentric or barycentric correction

  • Ability of using KOA file names or original file names [COMING SOON]

  • Full traceability of DRP versions and execution steps in HISTORY headers

  • Versatile sky subtraction modes including using external sky frames, ability to manually mask regions, or skipping it entirely

  • Formal support system via GitHub issues

For older versions, see Previous versions.


Follow the documentation in this section to reduce KCWI data.

More information


The DRP was developed in collaboration between:

  • Don Neill, Matt Matuszewki, Nik Prusinski, Chris Martin and the KCWI Team at Caltech

  • Max Brodheim, Luca Rizzi, and Rosalie McGurk at W. M. Keck Observatory

Vacuum-to-air and helio/barycentric correction algorithms provided by Yuguang Chen at Caltech.

Maintenance and support of the DRP are provided as part of the Data Services Initiative (PI: John O’Meara), in collaboration with the National Aeronautics and Space Administration.

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