| Proposal ID | 013594 |
| Title | X-Ray spectroscopy Observations of Hard Broad-Line QSOs detected in the ASCA Lar |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0135940101 |
| DOI | https://doi.org/10.5270/esa-kq9ed0l |
| Principal Investigator, PI | Dr Yoshihiro Uneda |
| Abstract | 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. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2002-07-10T00:07:00Z/2003-01-06T00:05:38Z |
| Version | 21.51_20241115_1113 |
| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2004-02-06T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "hard xray background", "hard xray spectra", "xray spectra", "hard band", "xray spectroscopic", "unified scheme", "sky survey", "broad line type", "asca lar", "x ray spectroscopy" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Yoshihiro Uneda, 2004, 'X-Ray spectroscopy Observations of Hard Broad-Line QSOs detected in the ASCA Lar', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-kq9ed0l |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |