Abstract
Abstract
We conducted a redshift survey of 12 X-ray selected clusters in the redshift range z = 0.35–0.50 with MMT/Hectospec. The redshift surveys confirm that these clusters are massive systems. There are no massive groups or clusters projected along the line of sight that might contaminate the observed cluster X-ray properties significantly. We identify 25–79 members per cluster and refine the estimates of each cluster’s mean redshift. We include the 8004 new redshifts in Data Behind the Figure.
Publisher
American Astronomical Society