| Proposal ID | 055517 |
| Title | Testing strong gravity in the NLS1 PKS 0558-504 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0555170201 |
| DOI | https://doi.org/10.5270/esa-a2caiek |
| Principal Investigator, PI | Dr Iossif Papadakis |
| Abstract | We propose to observe the radio-loud NLS1 galaxy PKS~0558--504 with XMM for fiveorbits (650 ksec). There has been evidence for QPOs with time scales of 7 ksecand 21 ksec in previous short XMM observations. These time scales are near afrequency ratio of 3:1, a well known result from Galactic Black Hole binaries.The main aims of the proposed XMM observation are to confirm the presence of aQPO like feature at 7 ksec, to search for evidence for the associated 21 ksecmodulation, and for the third possible time scale of 14 ks (the one with a 3:2frequency ratio). Confirmation of the presence of these time scales will providea unique probe of strong gravity in the vicinity of an AGN black hole. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2008-09-07T01:13:40Z/2008-09-16T14:46:01Z |
| 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 | 2009-10-28T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "short xmm", "main aims", "agn black hole", "frequency ratio", "0558 504", "time scale", "XMM", "galactic blackhole binary", "time scales" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Iossif Papadakis, 2009, 'Testing strong gravity in the NLS1 PKS 0558-504', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-a2caiek |