Objetivo We propose to use X-ray data from two pioneering in their kind and complementary multi-wavelength surveys, in order to perform a systematic study of obscured AGN. These leverage substantial investments of space- and ground-based telescope time, yielding a unique dataset to study the obscured Universe. The elusive population of obscured AGN most likely dominates the population of accreting super massive black holes, however, it remains mostly undetected.The impact of multi-wavelength observations for the study of AGN is crucial and the only way to obtain accurate demographics of obscured AGN at high red shift. If our findings will show substantial and widespread obscuration, this will have important implications for the cosmic accretion history of black holes. The pro posed collaboration will promote the professional reintegration of the proposed researcher and will help expanding the activities of the X-ray group of the Institute of Astronomy and Astrophysics of the National Observatory of Athens, by blending the fields of expertise of the researchers involved and by combining the unique datasets to which each party has access. Ámbito científico humanitieshistory and archaeologyhistorynatural sciencesphysical sciencesastronomyastrophysicsblack holesnatural sciencesmathematicspure mathematicsgeometry Programa(s) FP6-MOBILITY - Human resources and Mobility in the specific programme for research, technological development and demonstration "Structuring the European Research Area" under the Sixth Framework Programme 2002-2006 Tema(s) MOBILITY-4.2 - Marie Curie International Reintegration Grants (IRG) Convocatoria de propuestas FP6-2002-MOBILITY-12 Consulte otros proyectos de esta convocatoria Régimen de financiación IRG - Marie Curie actions-International re-integration grants Coordinador NATIONAL OBSERVATORY OF ATHENS Aportación de la UE Sin datos Dirección LOFOS NYMFON, THESIO ATHENS Grecia Ver en el mapa Enlaces Sitio web Opens in new window Coste total Sin datos