Power law index αν and relative number density values providing a satisfying fit between the predictions and the cumulative histogram of observed colours. These are shown for 6 αν values and at each of these points the data are slightly shifted in x-direction to display the 4 redshift bins, 1.0, 1.1, 1.2 and 1.3 from left to right. A few cases where satisfying fits are obtained only with σ values different from nominal are shown as solid triangles. Open symbols show how number density values are decreased with values of β1 and β2 specified in the graph.
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