I finished a first-draft set of figures for a putative paper on the bulge-mass vs black-hole-mass relation in galaxies. I find that even if the restrictive assumption is made that the relation is a power-law, the scatter around the relation is dominated by measurement uncertainties, not the intrinsic scatter (the scatter that would be observed given extremely high signal-to-noise measurements). I can also identify which galaxies are the largest outliers, accounting for their measurement uncertainties and marginalizing over all other parameters (including slope and intercept). Those galaxies are either truly anomalous or else have unrealistically small reported uncertainties on their black-hole or bulge masses.
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