Images and spectra retrieved by the GMCA with inpainting step in the real data from Cassiopeia A between 0.6 keV and 2.3 keV with a spectral binning of 14.6 eV and pixels of a 0.9 arcsec size. On the upper left, we recognize the synchrotron emission. On the lower left, the retrieved component seems to be dominated by Fe L. On the right, we see two components dominated by red- and blueshifted Si, respectively.