We propose to test the hypothesis that the cataclysmic variablesHS Cam (RX J0719.2+6557) and HT Cam (RX J0757.0+6306) are two short-period intermediate polars. While an alternative interpretation ispossible for each source based on the optical data, XMM-Newton observations caneasily provide the distinctive features: (i) the shape of the orbital variationof the X-ray intensity, and (ii) coherent X-ray pulsations caused by the spin ofthe white dwarf. We therefore propose short 15 and 13 ksec observations ofthese sources which is sufficient to identify these features.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2003-10-13T09:48:18Z/2003-10-13T14:23:35Z
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 Jochen Greiner, 2004, 'Two probable very-short period intermediate polars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-yg9b7cj
