We propose X-ray spectroscopic observations of broad-line (type-I)QSOs with hard X-ray spectra in a hard-band selected sample of theASCA Large Sky Survey. The purpose is to study the origin of thehardness of their X-ray spectra to reveal the nature of this newpolulation of sources, which could contribute significantly to thehard X-ray background instead of narrow-line (type-II) AGNs. Thisstudy is very important for understanding of the origin of the CXB,and for a test of the standard AGN synthesis models based on theunified scheme of the AGNs.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2002-07-10T00:07:00Z/2003-01-06T00:05:38Z
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 Yoshihiro Uneda, 2004, 'X-Ray spectroscopy Observations of Hard Broad-Line QSOs detected in the ASCA Lar', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-kq9ed0l
