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astro-ph2008★ 75 cited
SPACE: the SPectroscopic All-sky Cosmic Explorer
A. Cimatti, M. Robberto, C. M. Baugh +18
We describe the scientific motivations, the mission concept and the instrumentation of SPACE, a class-M mission proposed for concept study at the first call of the ESA Cosmic-Visio…
astro-ph2006★ 10 cited
Most hard X-ray selected quasars in Chandra Deep Fields are obscured
J. X. Wang, P. Jiang, Z. Y. Zheng +13
Measuring the population of obscured quasars is one of the key issues to understand the evolution of active galactic nuclei (AGNs). With a redshift completeness of 99%, the X-ray s…