|Title||Unabsorbed type 2 Seyfert galaxies: a challenge for Unified Models|
|Author||Dr Stefano Bianchi|
|Description||A campaign of simultaneous X-ray and optical observations of unabsorbed Seyfert 2s has already proved successful in the AO-5,leading to the discovery of the first .true. Seyfert 2 without broad line region.We therefore intend to pursue our strategy,proposing 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 more objects unabsorbed in the X-rays and without broad optical lines,which represent a serious challenge to simple AGN Unification Models.|
|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, 2009-08-23T00:00:00Z, 055094, 17.56_20190403_1200. https://doi.org/10.5270/esa-ihmhh8o|