Observed X-ray luminosity in the rest-frame 2–10 keV band as a function of the [O III]λ 5007 luminosity. The solid purple and blue lines represent the relation for Malkan et al. (2017) and Berney et al. (2015). The dashed lines indicate the same relationships but where the X-ray luminosities are absorbed by a column density of N_H = 1.5 × 10²⁴ cm⁻². The shaded area represents that the column density of absorbed gas is 1.5 × 10²⁴ cm⁻². The solid circles are 21 AGNs with [O III]λ 5007 detected. The different colors represent the S/N of the emission line. The cutting stars within the large circles represent CT-AGNs identified using the relationship between [O III]λ 5007 and X-ray luminosities. The solid squares are 56 AGNs with [O II]λ 3727 detected. The cutting stars within the large squares indicate CT-AGNs identified utilizing the relationship between estimated [O III]λ 5007 luminosities and X-ray luminosities.