efficiency consistent with normal early type galaxies.

Another galaxy with some post-starburst characteristics and dense gas measurements is NGC 1266 [@Alatalo2014; @Alatalo2015]. HCN (1–0) and CO (1–0) measurements are part of the Atlas-3D survey of early type galaxies [@Crocker2012]. While this galaxy has nebular emission lines that would exclude it from our post-starburst sample, it is possible that this “shocked" post-starburst galaxy is a precursor to our sample [@Alatalo2016]. NGC 1266 has the highest HCN/CO line luminosity ratio of any of the galaxies in the @Crocker2012 sample, in contrast to the low dense gas ratios seen here. @Alatalo2015 claim this difference may be caused by the molecular outflow in the nucleus of this galaxy enhancing the dense gas fraction in this region. NGC 1266 also has a unusually excited high-J CO emission, possibly from shocks [@Pellegrini2013]. In these integrated measurements, NGC 1266 appears to have a low SFR/$L^{\prime}($HCN$)$ and a normal SFR/$L^{\prime}($CO$)$. However, spatially resolved measurements show the galaxy to have a low SFR/$L^{\prime}($CO$)$ surface density ratio, perhaps driven by the galaxy’s outskirts, with a normal SFR/$L^{\prime}($CO$)$ in its nucleus [@Alatalo2015].

Variations in luminosity to mass conversion
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In order to interpret the HCN and CO luminosities as tracers of 