|Title||X-ray spectral properties of super-Eddington SDSS quasars|
|Author||Dr Murray Brightman|
|Description||We propose a 160-ks observing programme with XMM-Newton of 7 super-Eddington type one-quasars selected from SDSS. Due to their rare nature and relatively weak X-ray emission, these sources have not been well studied in the X-ray band. A strong correlation between the X- ray power-law index and the Eddington ratio has been well established, however models suggest that the correlation saturates at high Eddington rates. Our proposed observations will form part of a well selected sample of quasars over a wide range in Eddington ratio with good X-ray spectral constraints that will determine the nature of this relationship in the super-Eddington regime. If we find that the relationship does indeed flatten, it will yield insights into the geometry and physical condition of the corona.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||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|
|Credit Guidelines||European Space Agency, 2019-12-12T23:00:00Z, 082309, 17.56_20190403_1200. https://doi.org/10.5270/esa-5x4c5kv|