Highly Obscure (CT) QSOs are expected to be as numerous as unobscured QSOs athigh z. However, these elusive AGN are rare in even the deepest X-ray surveys.The selection criteria based on Mid-Ir and Optical colors is successfull topin-point many candidate CT QSOs. We selected a sample of 3 candidates obscuredQSOs by making use of multiwavelength data available in the SWIRE survey on 30deg2, requiring extreme values of the Mid-IR/Optical flux ratio and bright 24mum fluxes. We propose XMM-Newton observations for these 3 extreme sources. Byjoining this sample to the CDFs and COSMOS samples we will be able to determinethe evolution of the obscured AGN population at high z.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2009-10-17T22:50:53Z/2010-04-13T23:01:25Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
European Space Agency, Dr Fabrizio Fiore, 2011, 'Unveiling obscured accretion: The XMM-Newton view of IR selected SWIRE QSO2s', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-s82w0f2
