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The Keck Cosmic Web Imager: a capable new integral field spectrograph for the W. M. Keck Observatory

Morrisey, Patrick and Matuszewski, Mateusz and Martin, Chris and Moore, Anna and Adkins, Sean and Epps, Harland and Bartos, Randy and Cabak, Jerry and Cowley, Dave and Davis, Jack and Delacroix, Alex and Fucik, Jason and Hilliard, David and James, Ean and Kaye, Steve and Lingner, Nicole and Neill, James D. and Pistor, Christoph and Phillips, Drew and Rockosi, Connie and Weber, Bob (2012) The Keck Cosmic Web Imager: a capable new integral field spectrograph for the W. M. Keck Observatory. In: Ground-based and Airborne Instrumentation for Astronomy IV. Proceedings of SPIE. No.8446. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 844613. ISBN 978-0-8194-9147-3 http://resolver.caltech.edu/CaltechAUTHORS:20130403-143938745

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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).


Item Type:Book Section
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http://dx.doi.org/10.1117/12.924729DOIUNSPECIFIED
http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1362395PublisherUNSPECIFIED
Additional Information:© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). This material is based upon work supported by AURA through the National Science Foundation under Scientific Program Order No. 5 as issued for support of the Telescope Systems Instrumentation Program (TSIP), in accordance with Proposal No. AST-0335461 submitted by AURA. We also acknowledge and thank the Caltech Optical Observatories for continued support of both CWI and KCWI.
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Funding AgencyGrant Number
NSF Scientific ProgramUNSPECIFIED
NSFAST-0335461
Caltech Optical ObservatoriesUNSPECIFIED
Subject Keywords:Integral Field Spectrograph Keck Observatory KCWI
Record Number:CaltechAUTHORS:20130403-143938745
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130403-143938745
Official Citation: Patrick Morrissey ; Mateusz Matuszewski ; Chris Martin ; Anna Moore ; Sean Adkins, et al. "The Keck Cosmic Web Imager: a capable new integral field spectrograph for the W. M. Keck Observatory", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 844613 (September 24, 2012); doi:10.1117/12.924729; http://dx.doi.org/10.1117/12.924729
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37748
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:03 Apr 2013 22:46
Last Modified:03 Apr 2013 22:46

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