|Title||Unabsorbed type 2 Seyfert galaxies: a challenge for Unified Models|
|Author||Dr Stefano Bianchi|
|Description||We propose to observe with XMM-Newton a sample of .bona-fide. Seyfert 2 galaxies with no X-ray absorption. The selected sources are a conservative subsample taken from the Panessa & Bassani (2002) sample, including only Seyfert 2s where no column density in excess of the Galactic one has ever been observed in the X-rays, within sensitive limits. The primary goal of this proposal is to find objects unabsorbed in the X-rays and without broad optical lines, which would represent a serious challenge to simple AGN Unification Models. The key to find genuine .unabsorbed Seyfert 2s., excluding variability issues, is to perform simultaneous X-ray and optical spectroscopy. We therefore intend to coordinate ground-based optical observations with the XMM-Newton observations.|
|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, 2008-01-04T00:00:00Z, 040502, 17.56_20190403_1200. https://doi.org/10.5270/esa-1j3imjr|