We propose a 160-ks observing programme with XMM-Newton of 7 super-Eddingtontype one-quasars selected from SDSS. Due to their rare nature and relativelyweak 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 ratiohas been well established, however models suggest that the correlation saturatesat high Eddington rates. Our proposed observations will form part of a wellselected sample of quasars over a wide range in Eddington ratio with good X-rayspectral constraints that will determine the nature of this relationship in thesuper-Eddington regime. If we find that the relationship does indeed flatten, itwill yield insights into the geometry and physical condition of the corona.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2018-11-21T08:22:07Z/2018-11-21T11:58:47Z
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.
European Space Agency, Dr Murray Brightman, 2019, 'X-ray spectral properties of super-Eddington SDSS quasars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-5x4c5kv
