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The X-ray observatories XMM-Newton and Chandra provided a wealth of exciting new results on active galaxies, and many more are expected to emerge soon from the Gamma-ray mission INTEGRAL. Chandra delivered X-ray images of outstanding detail, reaching subarcsecond spatial resolution for the first time in X-ray astronomy. XMM-Newton with its high sensitivity provided X-ray spectra of unprecedented signal/noise...
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