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Proceedings Paper

The Keck Cosmic Web Imager: a capable new integral field spectrograph for the W. M. Keck Observatory
Author(s): Patrick Morrissey; Mateusz Matuszewski; Chris Martin; Anna Moore; Sean Adkins; Harland Epps; Randy Bartos; Jerry Cabak; Dave Cowley; Jack Davis; Alex Delacroix; Jason Fucik; David Hilliard; Ean James; Steve Kaye; Nicole Lingner; James D. Neill; Christoph Pistor; Drew Phillips; Connie Rockosi; Bob Weber
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Paper Abstract

The Keck Cosmic Web Imager (KCWI) is a new facility instrument being developed for the W. M. Keck Observatory and funded for construction by the Telescope System Instrumentation Program (TSIP) of the National Science Foundation (NSF). KCWI is a bench-mounted spectrograph for the Keck II right Nasmyth focal station, providing integral field spectroscopy over a seeing-limited field up to 20"x33" in extent. Selectable Volume Phase Holographic (VPH) gratings provide high efficiency and spectral resolution in the range of 1000 to 20000. The dual-beam design of KCWI passed a Preliminary Design Review in summer 2011. The detailed design of the KCWI blue channel (350 to 700 nm) is now nearly complete, with the red channel (530 to 1050 nm) planned for a phased implementation contingent upon additional funding. KCWI builds on the experience of the Caltech team in implementing the Cosmic Web Imager (CWI), in operation since 2009 at Palomar Observatory. KCWI adds considerable flexibility to the CWI design, and will take full advantage of the excellent seeing and dark sky above Mauna Kea with a selectable nod-and-shuffle observing mode. In this paper, models of the expected KCWI sensitivity and background subtraction capability are presented, along with a detailed description of the instrument design. The KCWI team is lead by Caltech (project management, design and implementation) in partnership with the University of California at Santa Cruz (camera optical and mechanical design) and the W. M. Keck Observatory (program oversight and observatory interfaces).

Paper Details

Date Published: 24 September 2012
PDF: 14 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 844613 (24 September 2012); doi: 10.1117/12.924729
Show Author Affiliations
Patrick Morrissey, California Institute of Technology (United States)
Mateusz Matuszewski, California Institute of Technology (United States)
Chris Martin, California Institute of Technology (United States)
Anna Moore, Caltech Optical Observatories (United States)
Sean Adkins, W. M. Keck Observatory (United States)
Harland Epps, Univ. of California, Santa Cruz (United States)
Randy Bartos, Jet Propulsion Lab. (United States)
Jerry Cabak, UCO/Lick Observatory (United States)
Dave Cowley, UCO/Lick Observatory (United States)
Jack Davis, Caltech Optical Observatories (United States)
Alex Delacroix, Caltech Optical Observatories (United States)
Jason Fucik, Caltech Optical Observatories (United States)
David Hilliard, UCO/Lick Observatory (United States)
Ean James, W. M. Keck Observatory (United States)
Steve Kaye, Caltech Optical Observatories (United States)
Nicole Lingner, California Institute of Technology (United States)
James D. Neill, California Institute of Technology (United States)
Christoph Pistor, UCO/Lick Observatory (United States)
Drew Phillips, UCO/Lick Observatory (United States)
Connie Rockosi, UCO/Lick Observatory (United States)
Bob Weber, Caltech Optical Observatories (United States)

Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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