MPE's first Wolter mirror system was launched on the Skylark rocket in
1979 from Woomera. Equipped with a precursor of the ROSAT PSPC it made
the first real colour picture in X-rays of a cosmic X-ray source (Puppis A).
Two further flights in 1982 and 1987 brought results on Cas A and the
Supernova 1987 A, respectively.
ASTRO-4 X-ray Mirror System