AGN fraction (f_AGN) contours in the projected pair separation R_n/r_vir,nei vs. the clustercentric distance R/r_200,cl for the galaxies with 0.04 ≤ z < 0.0927 and −20.0 ≥ M_r > −20.5. Four cases are given; the early-type target galaxies having an early-type neighbor (E-e), the early-type target galaxies having a late-type neighbor (E-l), the late-type target galaxies having an early-type neighbor (L-e), and the late-type target galaxies having a late-type neighbor (L-l). The points with error bars above the x-axes denote the average virial radius of BCGs.