Cryogenic Telescope On The Infrared Astronomical Satellite (IRAS)
Abstract
The Infrared Astronomical Satellite (IRAS) has completed an unbiased all-sky survey at wavelengths from 10 to 100 µm. 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/Hz^(1/2), 0.03, 0.025, 0.046 and 0.21 respectively (Jansky = 1E-26 w/m^2/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.
Additional Information
© 1984 SPIE--The International Society for Optical Engineering. The IRAS system performance stands as a lasting tribute to the dedication and skills of its designers and builders. The Infrared Astronomical Satellite was developed and is operated by the Netherlands Agency for Aerospace Programs (NIVR), the U.S. National Aeronautics and Space Administration (NASA) and the U.K. Science and Engineering Research Council (SERC).Attached Files
Published - 0430_288.pdf
Files
| Name | Size | Download all |
|---|---|---|
|
md5:c9358966b24a7d15f3e161928eaeb614
|
355.7 kB | Preview Download |
Additional details
- Eprint ID
- 74611
- Resolver ID
- CaltechAUTHORS:20170228-161115455
- Netherlands Agency for Aerospace Programs (NIVR)
- NASA
- Science and Engineering Research Council (SERC)
- Created
-
2017-03-01Created from EPrint's datestamp field
- Updated
-
2021-11-11Created from EPrint's last_modified field
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 430