Characterization of the polarized synchrotron emission from Planck and
  WMAP data
  The purpose of this work is to characterize the diffuse Galactic polarized
synchrotron. We present EE, BB, and EB power spectra estimated
cross-correlating Planck and WMAP polarization frequency maps at 23 and 30 GHz,
for a set of six sky regions covering from 30% to 94% of the sky. The EE and BB
angular power spectra show a steep decay of the spectral amplitude as a
function of multipole, approximated by a power law with power indices around
-2.9 for both components. The B/E ratio is about 0.22. The EB cross-component
is compatible with zero at 1$\sigma$, with upper constraint on the EB/EE ratio
of 1.2% at the 2$\sigma$ level. The recovered SED, in the frequency range 23-30
GHz, shows E and B power-law spectral indices compatible between themselves
with a value of about -3.
