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CALISTO: a cryogenic far-infrared/submillimeter observatory

Goldsmith, P. F. and Bradford, C. M. and Dragovan, M. and Khayatian, B. and Huffenberger, K. and O'Dwyer, I. J. and Górski, K. and Yorke, H. W. and Zmuidzinas, J. and Paine, C. and Satter, C. and Lee, R. (2007) CALISTO: a cryogenic far-infrared/submillimeter observatory. In: UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts III. Proceedings of SPIE. No.6687. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 66870P. ISBN 9780819468352.

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We present a design for a cryogenically cooled large aperture telescope for far-infrared astronomy in the wavength range 30 μm to 300 μm. The Cryogenic Aperture Large Infrared Space Telescope Observatory, or CALISTO, is based on an off-axis Gregorian telesocope having a 4 m by 6 m primary reflector. This can be launched using an Atlas V 511, with the only optical deployment required being a simple hinged rotation of the secondary reflector. The off-axis design, which includes a cold stop, offers exceptionally good performance in terms of high efficiency and minimum coupling of radiation incident from angles far off the direction of maximum response. This means that strong astronomical sources, such as the Milky Way and zodiacal dust in the plane of the solar system, add very little to the background. The entire optical system is cooled to 4 K to make its emission less than even this low level of astronomical emission. Assuming that detector technology can be improved to the point where detector noise is less than that of the astronomical background, we anticipate unprecedented low values of system noise equivalent power, in the vicinity of 10^(-19) WHz^(-0.5), through CALISTO's operating range. This will enable a variety of new astronomical investigations ranging from studies of objects in the outer solar system to tracing the evolution of galaxies in the universe throughout cosmic time.

Item Type:Book Section
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Goldsmith, P. F.0000-0002-6622-8396
Bradford, C. M.0000-0001-5261-7094
Additional Information:© 2007 Society of Photo-Optical Instrumentation Engineers (SPIE). We are very grateful to Dustin Crumb of ATK Space for very efficiently making many drawings of CALISTO, carrying out calculations, and supporting this effort in many other ways. We thank David Frayer for carrying out calculations of the confusion limit for CALISTO. This work has made use of NASA’s Astrophysics Data System.
Subject Keywords:Far–Infrared, Submillimeter, Space Observatory, Crogenic Telescope, Background–limited Sensitivity
Series Name:Proceedings of SPIE
Issue or Number:6687
Record Number:CaltechAUTHORS:20190517-141110238
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Official Citation:P. F. Goldsmith, C. M. Bradford, M. Dragovan, B. Khayatian, K. Huffenberger, I. J. O'Dwyer, K. Górski, H. W. Yorke, J. Zmuidzinas, C. Paine, C. Satter, and R. Lee "CALISTO: a cryogenic far-infrared/submillimeter observatory", Proc. SPIE 6687, UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts III, 66870P (20 September 2007); doi: 10.1117/12.731049;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95571
Deposited By: Tony Diaz
Deposited On:20 May 2019 17:45
Last Modified:16 Nov 2021 17:13

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