\begin{table}%t2
%\centering
\par
\caption{Density fits from continuum data.
\label{tbl-2}}
\[
\begin{array}{lcccccc}
\hline\hline
\noalign{\smallskip}
%\mbox{} & \mbox{}  & \mbox{Analytic}^{\mathrm{(a)}} & \mbox{}   &
%\mbox{~~~~~}   & \multicolumn{2}{c}{\mbox{Isothermal}} \\
\mbox{} & \multicolumn{3}{c}{\mbox{Analytic}^{{a}}} & 
\mbox{~~~~} & \multicolumn{2}{c}{\mbox{Isothermal}} \\
\mbox{} & n_0 \mbox{~(cm$^{-3}$)} & r_0 \mbox{~}('')  & \alpha
& \mbox{} & n_0 \mbox{~(cm$^{-3})$} & a \mbox{~(km s$^{-1}$)}  \\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
\mbox{L1498~~~~~} & 0.94 \times 10^5 & 75 & 3.5  & & 1.35 \times 10^5 & 0.32 \\
\mbox{L1517B} & 2.2 \times 10^5 & 35 & 2.5  & & 2.2 \times 10^5 & 0.27 \\
\noalign{\smallskip}
\hline
\end{array}
\]
\begin{list}{}{}
 \item[$^{{a}}$] $n(r) = {n_0/(1+(r/r_0)^\alpha)} $  
\end{list}
\end{table}