Quasars as standard candles - VI. Spectroscopic validation of the cosmological sample

Open Access

Fig. 8.

Values of Δα (Δα = 1 − α_bin/α_FS) in the bins of our parameter space as a function of the objects in each bin. Bins not meeting the representativeness criterion are marked with a circle. The dashed lines define the $\sim 1 / \sqrt{N_{obj}}$ ${\sim}1/\sqrt{N_{\mathrm{obj}}}$ envelope characterising the standard error on the average slope assuming a standard deviation σ_α = 1.

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