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|Authors:||Carrera, Francisco J. ; Mateos, Silvia ; Barcons, Xavier|
|Abstract:||The vast majority of the X-ray sources detected above the Galactic plane turn out to be Active Galactic Nuclei (AGN). Indeed, the emission of X-ray radiation is commonly taken to be the “smoking gun” evidence for the presence of an AGN, specially if the presence of significant obscuration hides it from view in the UV/optical. In this sense, it shares with the mid-IR (and the radio) the capability of uncovering otherwise hidden AGN. Significantly, the deepest X-ray observations yield the higher density of QSO to date. Large amounts of X-ray observing time have been invested in surveys of various widths and depths, in order to assemble a complete census of the AGN population, together with significant amounts of optical/near-IR spectroscopic observation time. We will review the current results, the synergies with observations at other wavelengths, and the prospect for exciting new results, including the brilliant future augured for this field with the launch of ESA’s new X-ray observatory Athena.|
|Description:||Trabajo presentado al Spanish X-ray Astronomy, celebrado en Santander del 3 al 5 de junoio de 2015.|
|Appears in Collections:||(IFCA) Comunicaciones congresos|
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