A dataset provided by the European Space Agency

Name: X-ray spectral properties of super-Eddington SDSS quasars
Published: 2019-12-12T23:00:00Z

Proposal ID	082309
Title	X-ray spectral properties of super-Eddington SDSS quasars
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0823090301
DOI	https://doi.org/10.5270/esa-5x4c5kv
Principal Investigator, PI	Dr Murray Brightman
Abstract	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.
Publications	X\\u2011HESS: A large sample of highly accreting serendipitous AGN under the XMM\\u2011Newton microscope \|Laurenti, M., Tombesi, F., et al. \| AN \| 344-20230053 \| 2023 \| 2023AN....34430053L \| http://ui.adsabs.harvard.edu/#abs/2023AN....34430053L The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII, O VIII, and Fe L-shell Transitions \|Pan, Zeyang, Qu, Zhijie, et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P
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.
Creator Contact	https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published	2019-12-12T23:00:00Z
Keywords	"super eddington type", "eddington ratio", "xray band", "SDSS", "eddington rates", "super eddington regime", "XMM", "xmm newton", "correlation saturates", "physical condition", "XMM-Newton", "wide range", "indeed flatten", "xray spectral constraints"
Publisher And Registrant	European Space Agency
Credit Guidelines	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