|Title||Probing the nature of the X-ray continuum in the quasar MR 2251-178|
|Author||Dr Emanuele Nardini|
|Description||We propose to carry out a joint XMM-Newton-NuSTAR campaign on the radio-quiet quasar MR 2251-178, arranged into four 25-ks observations. The goal is to understand the origin of the puzzling curvature in the X-ray continuum by taking advantage of both the simultaneous, high-quality spectral coverage over more than two decades in photon energy and the possible changes in the broadband spectral shape to distinguish among alternative physical models. This will provide fundamental insights into the emission process in the central regions of this X-ray bright quasar, and into the coupling between the illuminating continuum and the photoionized gas across various spatial scales, from the circumnuclear warm absorber to the 100-kpc wide emitting nebula.|
|Publication||Are narrow-line Seyfert 1 galaxies highly accreting low-MBH AGNs? . Williams, James K., Gliozzi, Mario, . MNRAS . 480-96 . 2018 . 2018MNRAS.480...96W ,
The soft X-ray excess: NLS1s versus BLS1s . Gliozzi, Mario, Williams, James K., . MNRAS . 491-532 . 2020 . 2020MNRAS.491..532G ,
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2016-12-30T23:00:00Z, 076392, 17.56_20190403_1200. https://doi.org/10.5270/esa-cp46gdt|