Fig. 2
Positions of the galaxies with measured velocities in the NGC 4756 field, on the un-dithered V-band image of Abell 1631 obtained using WFI at the 2.2-m MPG/ESO telescope at La Silla (Baade et al. 1999). Identified galaxies are at the velocity of NGC 4756 (red ~4000 km s-1) or the velocity of A1631 (white, at ~13 000 km s-1). Background galaxies are not labeled.
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