A campaign of simultaneous X-ray and optical observations of unabsorbed Seyfert2s has already proved successful in the AO-5,leading to the discovery of thefirst .true. Seyfert 2 without broad line region.We therefore intend to pursueour strategy,proposing to observe with XMM-Newton a sample of .bona-fide.Seyfert 2 galaxies with no X-ray absorption.The selected sources are aconservative subsample taken from the Panessa & Bassani (2002) sample,includingonly Seyfert 2s where no column density in excess of the Galactic one has everbeen observed in the X-rays,within sensitive limits.The primary goal of thisproposal is to find more objects unabsorbed in the X-rays and without broadoptical lines,which represent a serious challenge to simple AGN Unification Models.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2008-08-03T04:30:55Z/2008-08-03T09:29:29Z
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, Dr Stefano Bianchi, 2009, 'Unabsorbed type 2 Seyfert galaxies: a challenge for Unified Models', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ihmhh8o
