European X-ray Observatory Satellite (Exosat)
European X-ray Observatory Satellite (Exosat)
An artist's impression of the Exosat spacecraft. (Credit: ESA)
Lifetime: May 1983 - April 1986
Operator (primary): European Space Agency
Primary Science
The primary scientific goals of the Exosat were to measure the position, structural features and spectral and temporal characteristics of cosmic X-ray sources in the 0.04 - 80 keV range.
Science Highlights
- Discovery of quasi periodic oscillations (QPOs) in low mass X-ray binaries and X-ray pulsars
- Comprehensive study of the variability of active galactic nuclei
- Measurement of the iron line in glactic and extragalactic sources
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