\begin{table}%t3 \caption{\label{tab:bestfitvalues}Summary of the recovered model parameters. Chi-squared values refer to the ``best-fit'' model.} \par \small%\centering \par \begin{tabular}{c c c} \hline\hline & $M_*$ prior' & broad prior\\ & from photometry & \\ \hline constraints & 16 & 16 \\ free parameters & 6 & 6 \\ $\chi^2$ & 3.1 & 3.5 \\ $\chi^2$/d.o.f. & 0.31 & 0.35 \\ \hline $M_* \; (10^{11}~\msun)$ & $\rm 3.4\mypm{0.5}{0.7}$ &$\rm 6.6\mypm{0.8}{2.1}$ \\ $\epsilon_{\rm dm}$ & $\rm 0.16\mypm{0.20}{0.12}$&$\rm 0.27\mypm{0.22}{0.19}$ \\ $\Delta {\rm PA}_{\rm dm}$ & $\rm 20\mypm{16}{41}$ &$\rm 23\mypm{42}{62}$ \\ $r_{\rm c,dm}$ & $0\farcs48\mypm{0.52}{0.33}$ &$\rm 0\farcs72\mypm{0.52}{0.49}$ \\ $\sigma_{\rm dm}\; (\kms)$ & $\rm 218\mypm{43}{28}$ &$\rm 106\mypm{85}{72}$ \\ $\sigma_{\rm grp}\; (\kms)$ & $\rm 550\mypm{130}{240}$ &$\rm 690\mypm{90}{145}$ \\ \hline Total mass within $R_{\rm Ein}$ ($10^{11}~\msun$) & $\rm 5.8\mypm{0.3}{0.4}$ & $\rm 7.8\mypm{0.5}{1.1}$ \\ Dark Matter fraction $f_{\rm dm}({<}\Reff)$ & $\rm 0.41\mypm{0.09}{0.06}$ & $\rm 0.06\mypm{0.18}{0.06}$ \\ Group contribution $\vert \gamma_{\rm ext}\vert\sim \kappa_{\rm ext}$ & $\rm 0.039\mypm{0.021}{0.026}$ &$\rm 0.061\mypm{0.017}{0.023}$ \\ Slope $\alpha$ & $\rm -1.03\mypm{0.22}{0.16}$ & $\rm -1.45\mypm{0.30}{0.16}$ \\ Slope $\alpha^\prime$ & $\rm -1.11\mypm{0.27}{0.18}$ & $\rm -1.68\mypm{0.42}{0.22}$ \\ \hline \end{tabular} \end{table}