|A Search for Unusual X-ray Properties in High-z, High Accretion-Rate Quasars
|Dr Ohad Shemmer
|We propose to extend our XMM-Newton observations of extremely luminous, high accretion rate, radio-quiet quasars at zvirgul2-3, by observing five additional sources of this class with a total exposure time of 175 ks. Combined with our XMM-Newton AO4 observations of two such sources, we will obtain accurate measurements of the spectral slope in the virgul1.5-20 keV rest-frame band and look for X-ray variations in a sample of seven extreme quasars. Our prime goal is to test whether the X-ray spectral slope is an accretion-rate indicator for all AGN. Steep X-ray spectral slopes may identify our sources as the long sought high-z analogs of Narrow-Line Seyfert 1 galaxies.
|No observations found associated with the current proposal
|EMOS1, EMOS2, EPN, OM, RGS1, RGS2
|The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
|Publisher And Registrant
|European Space Agency
|European Space Agency, 2008, 040207, 17.56_20190403_1200. https://doi.org/10.5270/esa-p518i5d