[O iii]λ5007/Hβ vs. [N ii]λ6584 /Hα diagnostic diagram showing the mixing line color coded based on the Balmer decrement. The solid red and blue lines are the lines by Kewley et al. (2001) and Kauffmann et al. (2003) respectively. The models are outlined with the black filled circles and connected with the dashed black line. The point with the lower line ratios is the 100% black body model while the one with highest line ratios is the 100% AGN model. The fractional contribution of the AGN to the total amount of ionizing light is indicated for the models with 0-10-20-40-100% AGN fraction.