|Title||Neutron star radii from out-of-core cluster sources|
|Author||Prof Frank Verbunt|
|Description||The radius of neutron stars can be determined from their X-ray spectrum. Quiescent soft X-ray transients are the best candidates for this, provided their interstellar absorption and distance are independently known. We propose to observe two such systems, well outside the cores of globular clusters NGC6388 and NGC1904, which have high countrates, and are not contaminated by nearby other sources. We aim at better than 10 percent accuracy. These sources are also interesting from a dynamical point of view, since they must have been catapulted from the cluster cores. As a bonus, we will observe the cores of the two clusters, one of which is the second-highest in stellar-encounter frequency.|
|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, 2004-04-16T00:00:00Z, 014642, 17.56_20190403_1200. https://doi.org/10.5270/esa-kter82r|