This information is crucial to understand the nature of dark energy and the role, which dark matter played in the evolution of the Universe, namely, in formation of its large-scale structure.In addition to the all-sky survey, dedicated sky regions will be observed with higher sensitivity and follow-on pointed observations of selected sources at energies up to 30 ke V thereafter.
Its main aim is to make all-sky survey in the X-ray (0.511 ke V) band in order to find all massive clusters of galaxies in the Universe, millions of active galactic nuclei, including obscured ones and hundreds of thousands of Galactic X-ray sources.
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