Translator Disclaimer
1 September 1995 ISIS Fourier telescope concept for imaging the sun and the sky in hard x rays and gamma rays
Author Affiliations +
The Marshall Space Flight Center, Alabama in a teaming arrangement with the Naval Research Laboratory, Maryland has developed the ISIS (impulsive solar imaging spectrometer) mission for viewing the sun and the sky in the EUV, soft, and hard x rays. The soft and hard x ray imaging as well as the gamma-ray spectroscopy will be provided by a three axis pointed Fourier telescope (i.e. a spatial modulation collimator). The EUV imager will be a supporting context instrument. This paper describes the optimized instrument concept and discusses the associated trades made in developing it. For example, the numbers of spatial frequencies measured versus the sensitivity needed for imaging weak sources is discussed in detail. ISIS builds upon the YOHKOH findings in that the telescope is tailored to image compact simple loop sources. Only two spatial frequencies need be measured, allowing substantial gains in sensitivity. In addition, this allows both the real and imaginary Fourier components to be measured, which is a vast improvement over approaches that measure only the real components.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jonathan W. Campbell, Melody C. Herrmann, Greg Hajos, Susan Spencer, Reggie Alexander, Henry B. Waites, Howard D. Hall, Jonathon M. Fields, and Charles R. Taylor "ISIS Fourier telescope concept for imaging the sun and the sky in hard x rays and gamma rays", Proc. SPIE 2518, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI, (1 September 1995);


Swift: results from the first year of the mission
Proceedings of SPIE (July 26 2006)
X-ray multimirror spacecraft: a large telescope
Proceedings of SPIE (October 31 1996)
Single grid pair Fourier telescope for imaging the sky in...
Proceedings of SPIE (October 31 1996)
SIMBOL-X: a new-generation hard x-ray telescope
Proceedings of SPIE (January 29 2004)

Back to Top