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
Last Update 2025-01-27
Keywords "redshiftz $>$", "x ray spectra", "absorption column density", "xray spectral evolution", "resolve intriguing", "objects known4", "un equalled sensitivity", "broad energy band", "XMM", "xray spectrum", "redshift radio loud", "redshift quasars", "xray spectra", "xray spectral shape"
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