X-ray observations of Narrow-Line Seyfert 1 galaxies (NLS1) continue to drive our understanding of the Seyfert phenomenon, and physical models for NLS1suggest that they have extreme values of mass accretion rate or nuclearorientation. We propose an XMM study of Akn 564, one of the X-ray brightest andmost interesting NLS1, that will test these NLS1 models. We will study the shapeand variability of its energetically dominant soft X-ray excess to determine itsorigin and test the idea that NLS1 are characterized by high mass accretionrates. We will also study spectral features at low energy to determine if theyoriginate in an ionized accretion disk. We will use the broad FeK line profileto constrain the inner disk inclination and test nuclear orientation models.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2000-06-17T03:48:06Z/2001-06-09T11:55:56Z
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 William Brandt, 2003, 'An XMM Study of the Bright Narrow-Line Seyfert 1 Galaxy Arakelian 564', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-41a2yud
