Dust de-reddened (uins − r)0 vs. (g − i)0 colour–colour diagram of the 293 high-quality white dwarfs in J-PLUS DR1 (clean sample, cyan dots; outliers, red dots). The solid lines show the theoretical locus for DA (orange) and DB+DC WDs (magenta). The grey scale shows the most probable model that describes the observations. The blue probability distributions above and to the right show the (g − i)0 and (uins − r)0 projections of the data, respectively. The projections of the total, DA, and DB+DC models are represented with the black, orange, and magenta lines. The model in all the J-PLUS colour–colour diagrams shares the parameters μ = −0.808, s = 0.400, α = 2.65, fDA = 0.85, log g = 8.01, and Δ𝒞1 = 0.007 (see text for details). The values of the filter-dependent parameters σint and Δ𝒳WD are labelled in the panel.
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