Cryogenic Telescope On The Infrared Astronomical Satellite (IRAS)

F. J. Low; C. A. Beichman; F. C. Gillett; J. R. Houck; G. Neugebauer; D. E. Langford; R. G. Walker; R. H. White

doi:10.1117/12.936400

19 January 1984 Cryogenic Telescope On The Infrared Astronomical Satellite (IRAS)

F. J. Low, C. A. Beichman, F. C. Gillett, J. R. Houck, G. Neugebauer, D. E. Langford, R. G. Walker, R. H. White

Proceedings Volume 0430, Infrared Technology IX; (1984) https://doi.org/10.1117/12.936400
Event: 27th Annual Technical Symposium, 1983, San Diego, United States

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.

Citation Download Citation

F. J. Low, C. A. Beichman, F. C. Gillett, J. R. Houck, G. Neugebauer, D. E. Langford, R. G. Walker, and R. H. White "Cryogenic Telescope On The Infrared Astronomical Satellite (IRAS)", Proc. SPIE 0430, Infrared Technology IX, (19 January 1984); https://doi.org/10.1117/12.936400

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