We propose a 52 ks observation of the lensing, X-ray luminous cluster A 1703 toconstrain its total and hot gas mass profile. A 1703 is an unusually relaxedcluster at z=0.28 and provides a special opportunity to study its mass profileby applying hydrostatic equilibrium. The XMM observation will be crucial for asecure determination of its relaxed dynamical state and an accurate measurementof its mass and NFW concentration parameter, not constrained by the stronglensing analysis. Given the still debated issue of very high concentrationsfound for some massive lensing clusters, by obtaining high quality X-ray datafor a potentially well relaxed cluster we will perform a key test for the LambdaCDM scenario of structure formation.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2010-05-27T15:07:23Z/2010-07-12T16:53:17Z
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 Fabio Gastaldello, 2011, 'Probing with X-rays the mass distribution in the lensing cluster A1703', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-mfmswmh