X-ray Emission and Orientation of Selected PF Galaxy Clusters
  X-ray counterparts for 35 galaxy clusters contained in the PF catalog of
galaxy clusters and groups were found in XMM-Newton archive. 22 ones (all from
ACO catalogue) have extended elliptic X-ray haloes appropriate for
determination of orientation. Position angles and eccentricities were
calculated and compared with cluster orientations optical band.
