Name | 014758 |
Title | XMM Observations of Hard, Optically-Faint QSOs Discovered with ASCA |
URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0147580101 |
DOI | https://doi.org/10.5270/esa-v0qnuo0 |
Author | Dr Yoshihiro Ueda |
Description | We propose observations of medium-z QSOs with hard X-ray spectra in a bright, hard-band selected sample of the ASCA Medium Sensitivity Survey. These objects are considered to be bright (hence rare) counterparts of ..optically faint. objects detected at much fainter fluxes, which contribute a major part of the hard X-ray background. Due to their brightness, this sample gives us an ideal opportunity to investigate the nature of the key population that makes up the CXB. The purpose of the XMM observations is to reveal the origin of the hardness of their spectra. This study is critical for understanding of the origin of the CXB, and for a test of the standard AGN synthesis models based on the unified scheme of the AGNs, in particular, on the presence of luminous type-2 QSOs. |
Publication | No observations found associated with the current proposal |
Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2002-12-27T20:55:42Z/2003-08-09T10:44:54Z |
Version | 17.56_20190403_1200 |
Mission Description | The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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. |
Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
Date Published | 2004-09-11T00:00:00Z |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr Yoshihiro Ueda, 2004, 014758, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-v0qnuo0 |