Merging binary clusters

We study three prominent bimodal X-ray clusters : A3528, A1750, and A3395. Using observations taken with ROSAT and ASCA, we analyze the temperature an d surface brightness distributions. We also analyze the velocity distributi ons of the three clusters using new measurements supplemented with previous ly published data. We examine both the overall cluster properties, as well as the two subcluster elements in each. These results are then applied to t he determination of the overall cluster masses; they demonstrate excellent consistency between the various methods used. While the characteristic para meters of the subclusters are typical of isolated objects, our temperature results for the regions between the two subclusters clearly confirm the pre sence of merger activity. These three clusters represent a progression of e qual-sized subcluster mergers, starting from initial contact to immediately before first core passage.