| 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 |
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| 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 |
| Last Update | 2025-01-27 |
| Keywords | "eddington rates", "SDSS", "xmm newton", "physical condition", "indeed flatten", "xray band", "xray spectral constraints", "XMM-Newton", "eddington ratio", "super eddington type", "wide range", "XMM", "correlation saturates", "super eddington regime" |
| 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 |