  We present an analysis of the X-ray emission of the supernova remnant
MSH14-63, which was partially covered by three observations with XMM-Newton.
The detection of Fe K emission at 6.4 keV, and the lack of spatial correlation
between hard X-ray and radio emission is evidence against a dominant X-ray
synchrotron component. We argue that the hard X-ray continuum is best explained
by non-thermal bremsstrahlung from a supra-thermal tail to an otherwise cool
electron gas. The existence of low electron temperatures is supported by low
temperatures found in other parts of the remnant, which are as low as 0.2 keV
in some regions.
