Joint European Telescope for X-ray astronomy explained

The Joint European Telescope for X-ray astronomy (JET-X) was a space telescope which was constructed as part of the Spectrum-X-Gamma project and completed in 1994 but never actually launched. It is now on display in the Science Museum, London.^[1]

It was a join cooperation of the UK, Italy, West Germany and the Soviet Union and consists of two Wolter I X-ray telescopes.^[2]

Flight spare mirrors from JET-X were used to build the X-ray Telescope which is one of the instruments on the Neil Gehrels Swift Observatory^[3]

Notes and References

1. http://www.sciencemuseum.org.uk/objects/astronomy/2009-45.aspx Science Museum
2. K. A. Pounds (1990) "The Joint European Telescope for X-Ray Astronomy (Jet-X)", pp111 - 8 in Observatories in Earth Orbit and Beyond (Proceedings of the 123rd Colloquium of the International Astronomical Union, Held in Greenbelt, Maryland, U.S.A., April 24–27, 1990)
3. Web site: Swift's X-Ray Telescope (XRT).