Chandra Study of the very X-ray Luminous Distant Galaxy Cluster XMMUJ1230+1339 at z = 0.975

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Scientific paper

We propose a deep CHANDRA observation of one of the two most prominent X-ray luminous clusters at redshift around unity, XMMU J1230+1339 (Lx ~ 3 10e44 erg/s in 0.5 to 2.0 keV). The cluster found in our serendipitous XMM-Newton survey is also optically astonishingly rich. The main objective of the observation is to secure precise values of the global cluster parameters which can also be used as mass proxies: X-ray luminosity, temperature, gas mass and the Yx parameter. These properties and a good mass estimate are important for our detailed study of high z cluster galaxy populations, to establish scaling relations of clusters at this redshift, and to contribute to the compilation of a small sample of well characterized clusters at z > 0.8 for cosmological studies.

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