Fraction of red galaxies as a function of the density contrast. Galaxies are defined “red” when they have (U − B) ≥ 1.0. Different symbols are for different density measurement methods: red squares for bright volume limited tracers (MB ≤ −20.5 − z), while orange triangles for flux limited tracers. The values on the x axis represent the median density values in each density bin. The continuous red line is linear fits of the squares, and dashed orange line is the linear fit of the triangles. Their slopes with associated errors can be found in Table 1. “Ntot” is the total number of galaxies considered in each panel.
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