Best fit extinction curves of reddened quasars. The solid lines are for BAL quasars, while dashed lines are for non-BAL quasars. For comparison, the SMC extinction curve is also shown and labeled in the figure (dotted black line). The panel on the left shows the results assuming a minimum intrinsic slope α_λ,min = −2.9, while the panel on the right is obtained with α_λ,min = −2.6.