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Proceedings Paper

Cryogenic Telescope On The Infrared Astronomical Satellite (IRAS)
Author(s): F. J. Low; C. A. Beichman; F. C. Gillett; J. R. Houck; G. Neugebauer; D. E. Langford; R. G. Walker; R. H. White
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Paper Abstract

The Infrared Astronomical Satellite (IRAS) has completed an unbiased all-sky survey at wavelengths from 10 to 100 um. The design and performance of the focal plane array is described with emphasis on in-orbit measurements of the sensitivity and stability. In the four broad spectral bands centered at 12, 25, 60 and 100 um the system NEFD values are, in Jy/Hz1/2,0.03, 0.025, 0.046 and 0.21 respectively (Jansky = 1E-26 w/m2/Hz). For point sources, a single scan at the survey rate of 3.8 arcmin/sec yields limiting flux densities at the 3 sigma confidence level of 0.36 , 0.30, 0.39 and 1.2 Jy. The DC stability of the JFET amplifiers and the excellent off-axis rejection of the telescope permit total flux meaurements of extended infrared emission at levels below 1 E 6 Jy/sr. Response of the extrinsic silicon and germanium photodetectors to ionizing radiation is described.

Paper Details

Date Published: 19 January 1984
PDF: 9 pages
Proc. SPIE 0430, Infrared Technology IX, (19 January 1984); doi: 10.1117/12.936400
Show Author Affiliations
F. J. Low, University of Arizona (United States)
C. A. Beichman, California Institute of Technology (United States)
F. C. Gillett, Kitt peak National Observatory (United States)
J. R. Houck, Cornell University (United States)
G. Neugebauer, California Institute of Technology (United States)
D. E. Langford, California Institute of Technology (United States)
R. G. Walker, Jamieson Science and Engineering, Inc. (United States)
R. H. White, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 0430:
Infrared Technology IX
Richard A. Mollicone; Irving J. Spiro, Editor(s)

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