Proposal ID | 040207 |
Title | A Search for Unusual X-ray Properties in High-z, High Accretion-Rate Quasars |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0402070101 |
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 |