| Proposal ID | 076392 |
| Title | Probing the nature of the X-ray continuum in the quasar MR 2251-178 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0763920501 |
| DOI | https://doi.org/10.5270/esa-cp46gdt |
| Principal Investigator, PI | Dr Emanuele Nardini |
| Abstract | We propose to carry out a joint XMM-Newton/NuSTAR campaign on the radio-quietquasar MR 2251-178, arranged into four 25-ks observations. The goal is tounderstand the origin of the puzzling curvature in the X-ray continuum by takingadvantage of both the simultaneous, high-quality spectral coverage over morethan two decades in photon energy and the possible changes in the broadbandspectral shape to distinguish among alternative physical models. This willprovide fundamental insights into the emission process in the central regions ofthis X-ray bright quasar, and into the coupling between the illuminatingcontinuum and the photoionized gas across various spatial scales, from thecircumnuclear warm absorber to the 100-kpc wide emitting nebula. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2015-05-18T08:19:14Z/2015-12-12T01:54:45Z |
| 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 | 2016-12-30T23:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "XMM-Newton", "photon energy", "alternative physical models", "NuSTAR", "2251 178", "XMM", "central region", "wide emitting nebula", "spatial scales", "emission process", "radio quiet quasar", "fundamental insights", "xray bright quasar", "circumnuclear warm absorber", "broadband spectral shape", "illuminating continuum", "taking advantage", "xray continuum", "quality spectral coverage", "photoionized gas", "nustar campaign", "xmm newton" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Emanuele Nardini, 2016, 'Probing the nature of the X-ray continuum in the quasar MR 2251-178', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-cp46gdt |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |