\begin{table}%t3
\caption{\label{coefficients}Coefficients of the approximations.}
%\centering
\par
\begin{tabular}{lccccccccc} % 10 columns
\hline\hline
\noalign{\smallskip}
Profile      &  $a_1$ & $a_2$ & $a_3$ & $a_4$ & $a_5$ & $a_6$ & $a_7$ & $a_8$ & $a_9$ \\
\hline
            \citeauthor{EH89}$_{\rm{6}}$ & $-$0.041 & 5.95 & 0.264 & $-$1.45 & 3.35 & 3.16 & $-$0.0311 & 5.58 & $-$  \\
            \citeauthor{Her90} & $-$0.037 & 4.86 & 0.252 & $-$1.73 & 6.14 & 3.13 & $-$0.0429 & 7.62 & $-$  \\
            \citeauthor{Bur95} & $-$0.058 & 5.50 & 0.275 & $-$1.20 & 0.70 & 2.63 & $-$0.0234 & 7.44 & 0.027  \\
            \citeauthor{NFW97} & $-$0.056 & 6.18 & 0.267 & $-$1.46 & 3.31 & 3.19 & $-$0.0310 & 5.56 & $-$  \\
%\noalign{\smallskip}
\hline
                  &  $b_1$ & $b_2$ & $b_3$ & $b_4$ & $b_5$ & $b_6$ & $b_7$ \\
\hline
            \citeauthor{EH89}$_{\rm{6}}$ & $-$5.50 & 0.634 & 5.24 & 0.78 & 1.44 & 0.0343 & $-$0.72 \\
            \citeauthor{Her90} & $-$5.58 & 0.792 & 6.78 & 0.16 & 1.35 & 0.0351 & $-$1.77 \\
            \citeauthor{Bur95} & $-$4.24 & 0.722 & 4.91 & 2.24 & 1.32 & 0.0394 & $-$1.03  \\
            \citeauthor{NFW97} & $-$5.38 & 0.651 & 5.38 & 0.84 & 1.41 & 0.0346 & $-$0.82  \\
%\noalign{\smallskip}
\hline
\end{tabular}
\end{table}