GT- Some of the most interesting cosmological questions arethe mean density of the Universe, the fractional mass of the baryonsin the Universe, and the history of the production of the heavy elements in the frame of cosmic evolution. X-ray observations ofgalaxy clusters, a proper mass determination of these objects, andthe measurement of elemental abundances in the intracluster medium give very important clues to these questions. To utilize XMM in an ideal way for such a study we have selected one of the X-ray brightest,relaxed clusters at medium distance which allows to cover the essentialparts of the cluster in two pointings.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2000-10-30T23:51:42Z/2000-10-31T21:59:32Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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.
European Space Agency, Dr Bernd Aschenbach, 2002, 'Detailed Study of a Relaxed Galaxy Cluster at Medium Distance', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-1pwbjqy
