We propose an 84ks observation of the massive galaxy cluster ClJ1226.9+3332 atz0.89 to detect its emission out to the virial radius (Rv). This cluster is thehottest known at z>0.6 (kT=11.5keV), is highly luminous, and uniquely, appearsrelaxed. The proposed observation uses the sensitivity of XMM to trace theemission out to Rv, construct a detailed temperature profile, and map surfacebrightness and temperature variations on small and large scales. Combined withour existing high-quality multi-wavelength data, this will allow us to measurethe cluster.s properties (eg total mass, gas-mass fraction) with anunprecedented degree of accuracy. These measurements will enable newcosmological constraints to be placed, and provide the benchmark for comparisons with other high-z clusters.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2004-06-02T20:00:21Z/2004-06-03T23:27:30Z
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, Mr BENJAMIN MAUGHAN, 2005, 'THE HOTTEST comma RELAXED HIGH-Z GALAXY CLUSTER', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-srui9ze
