We have recently identified the cataclysmic variable (CV) HS2331+3905, whichdisplays a fascinating combination of properties: it is probably one of theoldest known CVs with a brown dwarf donor, it is brightest CV containing apulsating white dwarf which is probably rotating with a very short spin periodof 67s, and it may harbour a precessing warped accretion disc. We have alreadyexplored this system from the ultraviolet into the infrared, and request hereXMM-Newton time to unambiguously determine whether the white dwarf inHS2331+3905 is a magnetic rapid rotator.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2006-01-02T12:31:15Z/2006-01-02T21:34:42Z
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 Boris Gaensicke, 2007, 'Is the white dwarf in HS2331+3905 a rapid rotatorquestionMark', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ktfk3ca
