We propose a triggered ToO observation of the Narrow-Line Seyfert 1 galaxy Mkn335 in its low X-ray flux state for 200 ks with XMM-Newton. Mkn 335 is a verybright NLS1 with an exceptional broad iron line. In 2007 we caught it in anextreme low X-ray flux state. Still bright enough in its low-state, it offeres aunique opportunity to distinguish between two AGN key spectral models, thepartial covering absorber versus reflection models, and to study the .warm.circumnuclear BLR gas with the RGS in detail. These studies can only be done inan extreme low-state.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2009-06-11T07:16:06Z/2009-06-14T06:04:43Z
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 Dirk Grupe, 2010, 'The properties of the ionized gas in the NLS1 Mkn 335', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-h8uta9u
