Planck early results
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Surface brightness profile of PLCK G4.5-19.5 at z = 0.54, the highest-z cluster of the sample, as measured with XMM-Newton. The data of the emos12 and epn camera in the  [0.3–2.] keV energy band are combined. The green line indicates the best fitting model (see text); the red line is the best fitting model convolved with the point spread function (PSF) of XMM-Newton and the dashed line is the on axis XMM/PSF, normalised to the central intensity. The source is clearly extended.

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