Planck early results
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XMM-Newton images of all confirmed cluster candidates, except for the two triple systems which are shown on Fig. 12 and discussed in Sect.  7, in the  [0.3–2] keV energy band. The observations of PLCK G272.9+48.8 and PLCK G250.0+24.1 suffer from high background that has only been crudely subtracted. Image sizes are 3θ500 on a side, where θ500 is estimated from the M500YX relation (see Sect. 5.1). Images are corrected for surface brightness dimming with z, divided by the emissivity in the energy band, taking into account galactic absorption and instrument response, and scaled according to the self-similar model. The colour table is the same for all clusters, so that the images would be identical if clusters obeyed strict self-similarity. The majority of the objects show evidence for significant morphological disturbance. A yellow cross indicates the Planck position and a red/green plus sign the position of a RASS-BSC/FSC source.

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