A dataset provided by the European Space Agency

Proposal ID 030238
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-sprdm6g
Principal Investigator, PI Dr Ohad Shemmer
Abstract We propose to observe four of the most luminous quasars known, which haveextremely high accretion rates and are at redshift ~2-3, using XMM-Newton EPICPN and MOS with a total integration time of 135 ksec. We will obtain accuratemeasurements of the spectral slope in the quasars ~1.5-20 keV rest-frame bandand look for X-ray variations. Our prime goal is to test whether the X-rayspectral slope is an accretion-rate indicator for all AGN. Steep X-ray spectralslopes may identify our sources as the long sought high-redshift analogs ofnarrow-line Seyfert 1 galaxies.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2005-07-05T07:13:35Z/2005-11-01T06:25:41Z
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 2006-12-01T00:00:00Z
Last Update 2025-01-27
Keywords "accretion rate", "EPIC", "spectral slope", "XMM-Newton", "accretion rate quasars", "xray properties", "accretion rates", "total integration time", "redshift analogs", "narrow line seyfert", "xray spectral slope", "xray variations", "XMM", "luminous quasars", "xray spectral slopes"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Ohad Shemmer, 2006, '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-sprdm6g