High-cadence long-term Kepler data of cataclysmic variables V1504Cyg, V344Lyrand MVLyr show multi-component power density spectra of the fast stochasticvariability. The same is observed in X-rays in the case of SSCyg, RUPeg and,most recently, in MVLyr. Modelling studies allow a variety of accretingstructures as the source. However, conclusions based on a single wave bandremain ambiguous while we have achieved more robust conclusions from combinedoptical and X-ray observations of the nova like MVLyr. The case of the dwarfnova V1504Cyg is more complex because it comprises quiescence and outbursts.Since it is technically impossible to obtain optical Kepler data of SSCyg orRUPeg, we propose to observe V1504Cyg with XMM. The goal is to search for the break freq. found in Kepler data.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2017-09-26T15:58:01Z/2017-09-27T18:54:40Z
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, 2018, 'Fast stochastic variability in CV variable V1504 Cyg and source identification', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-5ge82i2
