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Fig. 1

image

Velocity histogram of the galaxies in the direction of RX J075243.6+455653. The black histogram shows the radial velocities of the galaxies within 4 Mpc from the cluster center. The gray filled histogram corresponds to galaxies within r200. The vertical line shows the mean velocity of the group. The dashed vertical lines are located at ± 3σc from Vc.

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