  We perform a blind multi-component analysis of the WMAP 1 year foreground
cleaned maps using SMICA (Spectral Matching Independent Component Analysis). We
provide a new estimate of the CMB power spectrum as well as the amplitude of
the CMB anisotropies across frequency channels. We show that the CMB
anisotropies are compatible with temperature fluctuations as expected from the
standard paradigm. The analysis also allows us to identify and separate a weak
residual galactic emission present significantly in the Q-band outside of the
Kp2 mask limits, and mainly concentrated at low galactic latitudes. We produce
a map of this residual component by Wiener filtering using estimated
parameters. The level of contamination of CMB data by this component is
compatible with the WMAP team estimation of foreground residual contamination.
In addition, the multi-component analysis allows us to estimate jointly the
power spectrum of unresolved point source emission.
