X-ray Astronomy at MPE
X-Ray Astronomy at MPE
- Mir-HEXE -
- Mir-HEXE -
The High Energy X-Ray Experiment (HEXE), built by MPE in collaboration
with the "Institut für Astronomie und Astrophysik" at the University of
Tübingen, Germany (AIT), was one of the four X-ray
instruments on board the Kvant module, docked to the Soviet space station
Mir since April 1987 (Reppin et al. 1985). Originally HEXE should have been
operated on the space station Salyut 7
(see the former logo), but
Salyut 7 was replaced by Mir when HEXE was launched. The astrophysics module
Kvant 1 was connected to Mir since April 1987 and the four instruments
were used until the end of Mir (March 23, 2001), although not very often in
the later phase of the mission.
Normal HEXE observations consisted of intervals of data acquisition of about 10-25 minutes, called sessions. The sessions are subdivided into alternating 240 s background and 270 s on-source pointings. The HEXE field of view is changed periodically from a background field - which is several degrees off the source - to the source and back.
Mir-HEXE was the space-proof version of a section of the (ballon-) HEXE also built and operated in close collaboration with the AIT. It was used to observe the X-ray sky during three successful flights in the years 1980 to 1983.