Three-dimensional view of the fundamental plane. The online X3D version of this figure has an interactive three-dimensional viewer to explore the data. We plot the median plane from the MCMC fits. Colors are as in Figure 6. Spheres are AGN, and spheres with axes drawn in them are Seyferts. Cubes are low/hard state XRBs, and cones are intermediate or high/soft state XRBs. The three-dimensional view of the data reveals that the data encompass a primarily planar region rather than either a line or a three-dimensional solid within the M–L_R–L_X space. This indicates that it can, in fact, be used to estimate black hole mass. The data in the interactive figure can be found in the following tables. XRB distances and masses are found in Table 4. XRB radio and X-ray fluxes are listed in Table 6. AGN data are listed in Table 5.

An interactive version of this figure is available in the online journal.