A dataset provided by the European Space Agency

Proposal ID 040207
Title A Search for Unusual X-ray Properties in High-z, High Accretion-Rate Quasars
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DOI https://doi.org/10.5270/esa-p518i5d
Principal Investigator, PI Dr Ohad Shemmer
Abstract We propose to extend our XMM-Newton observations of extremely luminous, highaccretion rate, radio-quiet quasars at z~2-3, by observing five additionalsources of this class with a total exposure time of 175 ks. Combined with ourXMM-Newton AO4 observations of two such sources, we will obtain accuratemeasurements of the spectral slope in the ~1.5-20 keV rest-frame band and lookfor X-ray variations in a sample of seven extreme quasars. Our prime goal is totest whether the X-ray spectral slope is an accretion-rate indicator for allAGN. Steep X-ray spectral slopes may identify our sources as the long soughthigh-z analogs of Narrow-Line Seyfert 1 galaxies.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2006-11-12T00:15:39Z/2007-01-09T07:39:54Z
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 2008-02-03T00:00:00Z
Last Update 2025-01-27
Keywords "additional sources", "accretion rate", "xmm newton ao4", "spectral slope", "xmm newton", "z analogs", "XMM-Newton", "accretion rate quasars", "total exposure time", "xray properties", "narrow line seyfert", "radio quiet quasars", "xray spectral slope", "XMM", "xray variations", "xray spectral slopes"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Ohad Shemmer, 2008, 'A Search for Unusual X-ray Properties in High-z, High Accretion-Rate Quasars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-p518i5d