Time dependent Comptonisation

We investigate the radiative response of an accretion disk corona system to short soft photons flares originating from the disk. The coronal response to the soft photon shots produces a strongly non-linear Comptionised radiation output, with complex correlation/anti-correlations between energy bands. This behavior strongly differs from those found with usual linear calculations. These results show that the feedback effects from the corona are important and should be taken into account by any model invoking the soft photon flux variability as a source for the hard X-ray variability of X-ray binaries or Seyfert galaxies.