|Title||XMM OBSERVATIONS OF LARGE CORE GLOBULAR CLUSTERS|
|Author||Dr Didier Barret|
|Description||Globular Clusters (GCs) are known to contain two classes of X-ray sources: The bright sources which are neutron star Low-mass X-ray Binaries (LMXBs) and the dim sources whose nature is still discussed. Some have proposed that they could be cataclysmic variables (CVs, DQ Her type), some others that they could be X-ray transients in quiescence (SXTs), or millisecond pulsars (MSPs), or even unrelated background objects. We propose to observe three GCs with large cores and use the XMM spectral capabilities to determine the nature of their dim X-ray source(s). Characterizing the content of GCs is of considerable interest for theories of binary production and evolution, as well as dynamical evolution and survival of the clusters in which they reside.|
|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, 2003-03-16T00:00:00Z, 008528, 17.56_20190403_1200. https://doi.org/10.5270/esa-ifkagcv|