|Title||Changing type Seyferts and the AGN unified model|
|Author||Prof Xavier Barcons|
|Description||In AO-3 we started a quasi-simultaneous X-ray-optical spectroscopy observation programme of changing type Seyfert galaxies, with the aim of investigating the origin of the apparent X-ray-optical type mismatches seen in some AGN. We use these type-changing AGN to test whether this mismatch is caused by non-simultaneity between the X-ray and optical observations or it is due to intrinsic properties of the Broad Line Region, as suggested by our previous work. In this proposal we request XMM-Newton observations of a sample of 5 targets (in addition to that already performed in AO-3). Quasi-simultaneous and delayed optical spectroscopy of these targets will also be obtained from the ground.|
|Publication||No observations found associated with the current proposal|
|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, 2007-07-01T00:00:00Z, 030560, 17.56_20190403_1200. https://doi.org/10.5270/esa-b2nvckj|