A dataset provided by the European Space Agency

Name 082309
Title X-ray spectral properties of super-Eddington SDSS quasars


DOI https://doi.org/10.5270/esa-5x4c5kv
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
Temporal Coverage 2018-11-21T08:22:07Z/2018-11-21T11:58:47Z
Version 17.56_20190403_1200
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2019-12-12T23:00:00Z
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