****************************************************** PR # 21502 We propose to observe, for 20ks each, 5 X-ray bright W UMa-type binary systems. Our goal is to obtain high-quality spectra for modelling of the coronal structures. ASCA is currently the only X-ray observatory that can investigate simultaneously both the "hard" (T of order 5 to 10 keV) component and the lower temperature (T of order 0.5 keV) emission. The proposed observations willextend the contact-binary survey started by the presentinvestigators in ASCA AO-1. ******************************************************