The Nature of the Intermediate Binary Star comma HD 209295

In HD 209295, we have recently discovered both intermediateorder gravity mode and loworder pressure mode pulsations. It is therefore both a gammaDoradus and a delta Scuti star, which makes it the first confirmed member of two classes of pulsating star. Our analyses reveal that the star is an SB1 binary, with an orbital period of 3.1 days, an eccentricity of 0.35 and a mass function of 0.042 solar masses. All observational evidence points to the secondary star being either a massive white dwarf or a neutron star. We propose to use theXMMNewton observatory to discover and investigate the nature of HD 209295.ssecondary using Xrays. This will allow us to refine the asteroseismologicalanalysis of the star through the greatly improved boundary conditions. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]