|Title||Probing the inner disk origin of the iron line in SAX J1808.4 3658|
|Author||Dr Tiziana Di Salvo|
|Description||We propose a 100-ks triggered XMM observation of the accreting millisecond pulsar J1808 in its next outburst to gather strong evidence of the inner disk origin of its broad iron emission line and to perform spin and orbital timing. The accretion disk during short-outburst transients is expected to be truncated both at the inner radius (by the neutron star magnetosphere) and at an outer radius of a few hundreds Gravitational radii because the disk is rapidly emptying. The ring-like shape of the disk will produce a clear double-peaked line profile, unique signature of the disk origin of the line. The clear detection of this profile by XMM will give the ultimate proof of the disk origin of the Fe line. This is a re-submission of a proposal approved in priority C for the XMM AO10.|
|Publication||On the timing properties of SAX J1808.4-3658 during its 2015 outburst . Sanna, A., Di Salvo, T., et all. . MNRAS . 471-463 . 2017 . 2017MNRAS.471..463S ,
NuSTAR and XMM-Newton broad-band spectrum of SAX J1808.4-3658 during its latest outburst in 2015 . Di Salvo, T., Sanna, A., et all. . MNRAS . 483-767 . 2019 . 2019MNRAS.483..767D ,
|Instrument||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, 2016-05-06T22:00:00Z, 072449, 17.56_20190403_1200. https://doi.org/10.5270/esa-3omrjqt|