Signatures of large-scale structure of Universe in X-rays
  A new sample of 4299 galaxies with X-ray emission was obtained in this work
by cross-correlating 2XMM catalog of X-ray sources with HyperLeda database of
galaxies. We analyzed distributions of optical and X-ray fluxes, redshifts and
X-ray luminosities for this sample. Virgo and Coma galaxy clusters can be
easily detected at redshift-space distribution of X-ray galaxies. X-ray
luminosity function of our galaxies shows the evidences of cosmological
evolution, even at low redshifts.
