  Magnetic excitations in Ba(Fe0.94Co0.06)2As2 are studied by polarized
inelastic neutron scattering (INS) above and below the superconducting
transition. In the superconducting state we find clear evidence for two
resonance-like excitations. At a higher energy of about 8 meV there is an
isotropic resonance mode with weak dispersion along the c-direction. In
addition we find a lower excitation at 4 meV that appears only in the
c-polarized channel and whose intensity strongly varies with the L-component of
the scattering vector. These resonance excitations behave remarkably similar to
the gap modes in the antiferromagnetic phase of the parent compound BaFe2As2.
