  Here we present three-dimensional high resolution simulations of Type Ia
supernova in the presence of a non-degenerate companion. We find that the
presence of a nearby companion leaves a long-lived hole in the supernova
ejecta. In particular, we aim to study the long term evolution of this hole as
the supernova ejecta interacts with the surrounding interstellar medium. Using
estimates for the x-ray emission, we find that the hole generated by the
companion remains for many centuries after the interaction between the ejecta
and the interstellar medium. We also show that the hole is discernible over a
wide range of viewing angles and companion masses.
