|Title||Observing the unusual neutron star transient Swift J1749.4-2807 in quiescence|
|Author||Mrs Nathalie Degenaar|
|Description||We propose a 50 ksec XMM-Newton observation of the transiently accreting neutron star Swift J1749.4-2807 during its quiescent state. The soft X-ray behavior of our target is highly unusual for transiently accreting X-ray binaries: after it exhibited a type-I X-ray burst, its 2-10 keV luminosity decreased by nearly three orders of magnitude in about 1 day, all the way down to its quiescent level of virgul1E33 erg-s. With our proposed observation we aim to investigate the possibility that low-level accretion occurs by studying the quiescent spectral shape and searching for X-ray variability. It also allows us to constrain contributions from a thermal component, thereby probing a new parameter regime for neutron star cooling models.|
|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, 2012-04-12T00:00:00Z, 065567, 17.56_20190403_1200. https://doi.org/10.5270/esa-seugbl8|