| Proposal ID | 050540 |
| Title | The remarkable variability and X-ray spectrum of the narrow-line quasar PHL 1092 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0505400101 |
| DOI | https://doi.org/10.5270/esa-85okeve |
| Principal Investigator, PI | Dr Giovanni Miniutti |
| Abstract | PHL~1092 is known for its extreme X-ray variability observed by previous X--raymissions (see results from the ROSAT monitoring of the source by Brandt et al1999). The fast and large amplitude variability is common in narrow--line typeobjects but rather unusual given the quasar--type luminosity of the source(about $10^{45}$erg/s in the 0.4--10 keV rest--frame). The flux variability isalso associated with complex spectral variability revealed (but poorlyunderstood) from previous relatively short XMM--Newton observations. We proposeto observe PHL~1092 with XMM--Newton to investigate in great detail the natureof the spectral complexity and of the extreme X--ray |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2008-01-20T02:26:48Z/2008-01-20T20:15:34Z |
| Version | 21.51_20241115_1113 |
| 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 | 2009-02-13T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "brandt 1999", "x ray", "complex spectral variability", "ROSAT", "flux variability", "kev rest frame", "amplitude variability", "}$ erg", "XMM", "quasar type luminosity", "xray spectrum", "xray variability", "spectral complexity", "x ray missions", "xmm newton" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Giovanni Miniutti, 2009, 'The remarkable variability and X-ray spectrum of the narrow-line quasar PHL 1092', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-85okeve |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |