Recent RXTE and XMM observations have revealed ..characteristic time scales inthe power spectra of AGN. The AGN PSDs appear to be similar to the power spectraof Galactic X-ray binaries, except from Ark 564. There are two ..breakfrequencies in the power spectrum of this source, but none of them appears toscale linearly with central black hole mass when compared with the appropriatebreak frequencies found in the PSDs of Galactic sources at low/hard or..high/soft state. Here we propose a long (95 ksec) XMM observation of Ark 564in order to detrmine accurately its high frequency PSD and investigate whetherthis source is unique among AGN with known PSDs, or its variability propertiesare similar to the properties of Galactic X-ray sources at the very high state.
Instrument
RGS1, EPN, RGS2, EMOS1, OM, EMOS2
Temporal Coverage
2005-01-05T19:02:03Z/2005-01-06T23:18:17Z
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 IOSSIF PAPADAKIS, 2006, 'ARK 564: A ''VERY HIGH STATE', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-befty95
