The Nature of the Vela SNR X-ray Emission

GTWe propose to observe two filaments in the shock region of the Vela SupernovaRemnant which we have already observed in the optical and in the XRay band(with ROSAT/PSPC). We have found out that there is a strong evidence of shockISM inhomogeneities interaction, but the low spatial and spectral resolution ofPSPC data prevented us to study the real nature of the Xray emission. In particular, our primary goal is to carry on spatially resolved spectral analysison a 1x1 arcmin resolution element of the postshock region. This will allow usto discriminate clearly between the interaction processes, either evaporative orbow shock or secondary shocks, to derive the metal abundances behind the shock,and to understand the connection between different ISM phases. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]