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Rosetta's journey to Comet Churyumov-Gerasimenko

Balsiger, Hans; Schwehm, Gerhard

Surprises in the Hard X-ray Sky

Courvoisier, Thierry J. -L.

Cosmic objects emit throughout the electro-magnetic spectrum, from radio waves to very high-energy gamma rays. Some spectral regions can be observed from the ground, but space instrumentation is needed for most of them. Some spectral regions are particularly difficult, for example hard X-rays and MeV gamma rays. For one thing, in this spectral reg…