In AO-3 we started a quasi-simultaneous X-ray/optical spectroscopy observationprogramme of changing type Seyfert galaxies, with the aim of investigating theorigin of the apparent X-ray/optical type mismatches seen in some AGN. We usethese type-changing AGN to test whether this mismatch is caused bynon-simultaneity between the X-ray and optical observations or it is due tointrinsic properties of the Broad Line Region, as suggested by our previouswork. In this proposal we request XMM-Newton observations of a sample of 5targets (in addition to that already performed in AO-3). Quasi-simultaneous anddelayed optical spectroscopy of these targets will also be obtained from theground.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2005-10-27T00:31:37Z/2006-06-14T21:09:56Z
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.
European Space Agency, Prof Xavier Barcons, 2007, 'Changing type Seyferts and the AGN unified model', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-b2nvckj
