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Fig. 1

image

Distribution on the sky of the SDSS galaxies observed for NIBLES. The radial velocities of the galaxies have been divided into bins and color-coded accordingly, see the legend. The shaded areas indicate zones that we aimed to avoid, when possible: the pink area indicates the Virgo Cluster volume which only extends out to V = 2000 km s-1, and the gray areas indicate the zones to be covered by the ALFALFA blind H i survey: the lighter shade shows the total area, and the darker shade those areas for which results were included in the α.40 catalog (Haynes et al. 2011).

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