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Paper: Optical vs. X-ray Selection for Finding Clusters of Galaxies
Volume: 240, Gas and Galaxy Evolution: A Conference in Honor of the 20th Anniversary of the VLA
Page: 644
Authors: Gilbank, D. G.; Bower, R. G.; Castander, F. Javier
Abstract: At intermediate redshifts, optical and X-ray approaches are both competitive methods of discovering galaxy clusters. However, the properties of the discovered clusters, and their member galaxies, may be strongly dependent on the search method used. To directly compare the systematic differences in mass, dynamical structure, galaxy evolution, etc., we have undertaken a cluster survey with deep optical and X-ray data. Whilst all the X-ray clusters are recovered using optical selection, we find an additional population of highly significant rich clusters that are not detected in the X-ray imaging. We are currently undertaking follow-up spectroscopy and near-infrared imaging.
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