****************************************************** PR # 11041 We propose observations of four X-ray binary systems: Cir X-1,V4134 Sgr, LMC X-1, and GX 9+9. We hope to study the spectra and temporal variability of these systems and will obtain important information on X-ray spectral line formation, absorbing material in X-ray binary systems, ultrasoft spectral humps, spectral state variability, quasi- periodic oscillations, periodic spectral dips,and X-ray bursts. We have specifically chosen targets about which there are important unanswered questions that may be addressed effectively with ASCA. ******************************************************