|Title||HU Aqr: A magnetic accretion key study|
|Author||Dr Axel Schwope|
|Description||HU Aqr is a unique, bright eclipsing polar (AM Herculis binary) providing incredible diagnostic power at X-ray and optical wavelengths. This includes eclipses by the mass-donating companion star, pre-eclipse dips caused by absorption in the accretion stream, and selfeclipses of the accretion spot by the white dwarf. Previous ROSAT-EUVE-optical observations resolved (marginally) the accretion spot, revealed a strongly evolving light curve and displayed a large scatter in eclipse timings. With XMM-Newton we will monitor the spectral evolution of the source, study the interaction of the accretion stream with the magnetosphere and measure the location and size of the accretion spot in soft and hard X-rays as a function of mass transfer rate with unprecedented accuracy.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2004-11-20T00:00:00Z, 015309, 17.56_20190403_1200. https://doi.org/10.5270/esa-uhr79nq|