V1223 Sgr is the X-ray brightest of the typical intermediate polars(excluding the anomalous EX Hya); it would likely have been a GT/AO-1target if it weren.t for an OM brightness constraint that no longerapplies. We propose a 40-ksec observation to make a benchmark studyof the X-ray spectrum of this type of star, in particular how thespectrum varies with the spin cycle of the magnetic white dwarf. Wewill perform phase-resolved spectroscopy of a multi-temperature,multi-component spectrum, whose parametrisation will tie downthe geometry and physical processes in the accretion regions of asystem that is an exemplar of magnetically controlled accretion.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2003-04-13T12:34:53Z/2003-04-13T23:24:08Z
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 Coel Hellier, 2004, 'Magnetically controlled accretion in the intermediate polar V1223 Sgr', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-zlytskm
