Non-zero emittance case with Nx = Ny = 0.0059 and Dx = Dy = 0.15 corresponding to the previously defined case for 580 eV. Left side: modulus of the cross-spectral density, (top plot), the function (middle plot) and the fringe visibility V (lower plot) as a function of for different values of the energy spread (see legend) and for = 0.5 at the virtual source position. Right panel: the same as in the left panel, for = 0.5 in the far zone. The symbols indicate actually simulated data. The solid lines are only a guide to the eye.