A dataset provided by the European Space Agency

Proposal ID 009316
Title X-ray Spectra of z>4 Quasars
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0093160101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0093160201
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0093160701

DOI https://doi.org/10.5270/esa-lg8dm1f
Principal Investigator, PI Dr Smita Mathur
Abstract We propose to harness both the unequalled sensitivity of XMM and its broad energy band to systematically study a sample of 6 high redshift (z>4) quasars. XMM can determine accurately both the absorption column density and the underlying spectral shape of the X-ray emission allowing us to resolve intriguing, outstanding questions such as: Is the apparent difference between the X-ray spectra of high-redshift radio-loud and radio-quiet quasars real If so, is it explained by intrinsic absorption or by different evolution of the X-ray spectrum with redshift What contraints can we place on the X-ray spectral evolution with reshift and/or luminosity for each class. What limits can we put on intervening Damped Ly-alpha systems and on the X-ray Forest
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-11-23T05:01:41Z/2002-08-23T18:51:18Z
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2003-10-30T00:00:00Z
Last Update 2025-01-27
Keywords "x ray forest", "redshift z", "unequalled sensitivity", "x ray spectra", "absorption column density", "xray spectral evolution", "resolve intriguing", "spectral shape", "xray emission", "broad energy band", "XMM", "xray spectrum", "redshift radio loud", "xray spectra"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Smita Mathur, 2003, 'X-ray Spectra of z>4 Quasars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-lg8dm1f