A dataset provided by the European Space Agency

Proposal ID 020346
Title X-RAY SPECTRA OF HIGH REDSHIFT QUASARS
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0203460101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0203460201

DOI https://doi.org/10.5270/esa-yriv8c2
Principal Investigator, PI Prof SMITA MATHUR
Abstract We propose to harness both the un-equalled sensitivity of XMM and its broadenergy band to systematically study a sample of 9 high redshift(z > 4) quasars,the most luminous, youngest and least studied objects known(4 new observations).XMM can determine accurately both the absorption column density and the X-rayspectral shape allowing us to resolve intriguing, outstanding questions such as:Is the apparent difference between the X-ray spectra of high-redshift radio-loudand radio-quiet quasars real? If so, is it explained by intrinsic absorption orby different evolution of the X-ray spectrum with redshift? What constraints canwe place on the X-ray spectral evolution with redshift and/or luminosity foreach class? What limits can we put on intervening Damped Ly-alpha systems?
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-01-31T12:20:14Z/2004-12-23T09:37:00Z
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 2006-01-27T00:00:00Z
Keywords "un equalled sensitivity", "redshift quasars", "XMM", "absorption column density", "xray spectrum", "xray spectral shape", "xray spectral evolution", "x ray spectra", "broad energy band", "redshiftz $>$", "xray spectra", "objects known4", "redshift radio loud", "resolve intriguing"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Prof SMITA MATHUR, 2006, 'X-RAY SPECTRA OF HIGH REDSHIFT QUASARS', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-yriv8c2