Abstract
A new method for measuring the redshifts of galaxy clusters based on photometric SDSSIII data is presented. Highly accurate photo-z measurements for red-sequence galaxies using machine learning techniques on a training sample of luminous red BOSS LOWZ galaxies allow the redshifts of clusters at z < 0.45 to be determinedwith an accuracy σnorm = 0.011. The accuracy of the proposed method has been estimated on galaxy clusters from the 400d catalog.
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