X-rays from Very Short Period Wolf-Rayet Binaries

We propose to carry out EPIC imaging spectroscopy of two WolfRayet binarieswith very short period (P < 1 day). Thanks to the excellent EPIC sensitivity, wewill\\: (i) obtain good quality spectra of these objects yet unobserved with themodern Xray observatories (Chandra, XMMNewton); (ii) deduce the plasmaparameters in their Xray emitting region; (iii) derive valuable information ontheir origin.