|Title||The big dipper to learn about accretion disks and their ionized atmosphere|
|Author||Dr Laurence Boirin|
|Description||With the discovery of FeXXV and FeXXVI absorption lines in the dipping systems (viewed close to the disk plane), XMM has revealed the existence of a highly-ionized atmosphere above the accretion disk in low-mass X-ray binaries. We have further demonstrated that the spectral changes during dips, both in the lines and in the continuum could be explained by a decrease in the ionization level of this plasma. We want to investigate the structure of the disk and of its ionized atmosphere through time-resolved spectroscopy of the dips in X 1624-490. Using the orbital ephemeris, we propose to trigger 4 observations, each one centered on one dip, for a total exposure of 104 ks.|
|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, 2008-11-24T00:00:00Z, 040233, 17.56_20190403_1200. https://doi.org/10.5270/esa-s5akfje|