t panel, the blue filled circles, green filled triangles, and red filled squares indicate the objects with Av $<$ 0.0, 0.0 $\leq$ Av $<$ 0.0, and Av $\geq$ 0.0, respectively. In the right panel, the blue filled circles and red filled squares indicate the objects with $\beta_{\mathrm{obs}} \leq -0.00$ and $\beta_{\mathrm{obs}} > -0.00$