Plot showing BH mass vs stellar velocity dispersion (M_BH-σ_* relation). The symbols of our 7 AGNs are similar to that of Fig. 8. The figure is redrawn from Fig. 3 of Greene et al. (2020), but with the addition of the 4 targets introduced in this work. Early- and late-type galaxies are shown as red circles and blue hollow squares, respectively, while BH mass upper limits of some low-mass late-type galaxies are shown as inverted blue triangles. All these galaxies’ measurements are taken from Greene et al. (2020) and referenced therein. The best-fit M_BH-σ_* relation for early- and late-type galaxies are shown as red and blue-shaded regions, while the best-fit relation for all galaxies is shown as a grey-shaded region. The best-fit lines are surrounded with their 1σ confidence interval, and all best-fit values are also taken from Greene et al. (2020).