We propose XMM-Newton+HST observations of the new, extremely X-ray luminouscluster ClGJ120959.0+495352 (z=0.90), discovered through our combined search ofRASS and SDSS data. Optical and SZ data suggest that it is an excellentcandidate for a very massive, dynamically relaxed cooling-core cluster, whichare extremely rare at high z. The XMM-Newton data will provide the firstresolved X-ray imaging of the system to confirm its dynamical state andconstrain both the temperature profile and global cluster properties. The HSTdata will provide complementary constraints on the cluster mass and dynamicalstate from strong and weak lensing, enabling the comparison to scaling relationsand the assessment if the cluster.s discovery is in line with standard cosmological expectations.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2013-10-31T16:01:32Z/2013-11-02T19:46:40Z
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 Tim Schrabback, 2014, 'An XMM-Newton+HST study of the likely most X-ray luminous z>=0.9 galaxy cluster', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-hgm09co
