  The temperature and polarization anisotropies of the Cosmic Microwave
Background are analyzed under the hypothesis that the same inflationary seed
accounting for protogalactic magnetism also affects the Einstein-Boltzmann
hierarchy whose initial conditions are assigned for typical correlation scales
larger than the Hubble radius after matter-radiation equality but before
decoupling. Since the primordial gauge spectrum depends on a combination of
pivotal parameters of the concordance model, the angular power spectra of the
temperature and of the polarization are computed, for the first time, in the
presence of a putative large-scale magnetic field of inflationary origin and
without supplementary hypotheses.
