Some cataclysmic variables exhibit a multicomponent power density spectrum offast variability. High-cadence long-term Kepler data of MV Lyr showed 4different characteristic components, while XMM X-ray observations of RU Peg inquiescence contained two different components. Modelling studies suggest avariety of accreting disc structures as the source of variability. However, westill depend on speculations because the source identification is notunambiguous without combined optical and X-ray observations of the same system.Since it is technically impossible to obtain optical Kepler data of RU Peg, wepropose to observe MV Lyr in X-rays and UV with XMM. The goal is to search forthe two highest break frequencies found in the Kepler data.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2015-09-06T15:06:43Z/2015-09-07T09:03:23Z
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 Andrej Dobrotka, 2016, 'Fast stochastic variability in CV variable MV Lyr and source identification', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ncdmwfo
