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Design and development of MOSFIRE: the multi-object spectrometer for infrared exploration at the Keck Observatory

McLean, Ian S. and Steidel, Charles C. and Epps, Harland and Matthews, Keith and Adkins, Sean and Konidaris, Nick and Weber, Bob and Aliado, Ted and Brims, George and Canfield, John and Cromer, John and Fucik, Jason and Kulas, Kristin and Mace, Greg and Magnone, Ken and Rodriguez, Hector and Wang, Eric and Weiss, Jason (2010) Design and development of MOSFIRE: the multi-object spectrometer for infrared exploration at the Keck Observatory. In: Ground-based and Airborne Instrumentation for Astronomy III. Proceedings of SPIE. No.7735. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 77351E. ISBN 9780819482259.

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MOSFIRE is a unique multi-object spectrometer and imager for the Cassegrain focus of the 10 m Keck 1 telescope. A refractive optical design provides near-IR (0.97 to 2.45 μm) multi-object spectroscopy over a 6.14' x 6.14' field of view with a resolving power of R~3,270 for a 0.7" slit width (2.9 pixels in the dispersion direction), or imaging over a field of view of 6.8' diameter with 0.18" per pixel sampling. A single diffraction grating can be set at two fixed angles, and order-sorting filters provide spectra that cover the K, H, J or Y bands by selecting 3rd, 4th, 5th or 6th order respectively. A folding flat following the field lens is equipped with piezo transducers to provide tip/tilt control for flexure compensation at the 0.1 pixel level. A special feature of MOSFIRE is that its multiplex advantage of up to 46 slits is achieved using a cryogenic Configurable Slit Unit or CSU developed in collaboration with the Swiss Centre for Electronics and Micro Technology (CSEM). The CSU is reconfigurable under remote control in less than 5 minutes without any thermal cycling of the instrument. Slits are formed by moving opposable bars from both sides of the focal plane. An individual slit has a length of 7.1" but bar positions can be aligned to make longer slits. When masking bars are removed to their full extent and the grating is changed to a mirror, MOSFIRE becomes a wide-field imager. Using a single, ASIC-driven, 2K x 2K H2-RG HgCdTe array from Teledyne Imaging Sensors with exceptionally low dark current and low noise, MOSFIRE will be extremely sensitive and ideal for a wide range of science applications. This paper describes the design and testing of the instrument prior to delivery later in 2010.

Item Type:Book Section
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URLURL TypeDescription
Steidel, Charles C.0000-0002-4834-7260
Konidaris, Nick0000-0003-1905-2815
Mace, Greg0000-0001-7875-6391
Additional Information:© 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). MOSFIRE is being developed by the consortium of the University of California, Los Angeles, California Institute of Technology, University of California, Santa Cruz and the W. M. Keck Observatory. This material is based upon work supported by AURA through the National Science Foundation under AURA Cooperative Agreement AST 0132798, as amended. Funding has also been provided through a generous donation by Gordon and Betty Moore. It is pleasure to acknowledge the cooperation of the Swiss Centre for Electronics and Micro Technology (CSEM) and Teledyne Imaging Sensors. We also thank all of the vendors that have worked with us to produce this instrument.
Funding AgencyGrant Number
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Subject Keywords:spectrometer, near-infrared, multi-object, Configurable Slit Unit, MOSFIRE, Keck Observatory
Series Name:Proceedings of SPIE
Issue or Number:7735
Record Number:CaltechAUTHORS:20190930-133757189
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Official Citation:Ian S. McLean, Charles C. Steidel, Harland Epps, Keith Matthews, Sean Adkins, Nicholas Konidaris, Bob Weber, Ted Aliado, George Brims, John Canfield, John Cromer, Jason Fucik, Kristin Kulas, Greg Mace, Ken Magnone, Hector Rodriguez, Eric Wang, and Jason Weiss "Design and development of MOSFIRE: the multi-object spectrometer for infrared exploration at the Keck Observatory", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77351E (20 July 2010);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98960
Deposited By: George Porter
Deposited On:01 Oct 2019 14:25
Last Modified:03 Oct 2019 21:46

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