\begin{table}%t2
\caption{Retention fraction fit results for a constant kick velocity distribution.}
\label{constant}
%\begin{center}
\par
\begin{tabular}{ c c c c c c c } \hline\hline
& \multicolumn{2}{c}{King} & \multicolumn{2}{c }{P-center} & \multicolumn{2}{c}{P-spread} \\%\hline
$x$ &Exponent&Fraction&Exponent&Fraction&Exponent&Fraction\\\hline
500 & 0.53 & 0.041 & 0.50 & 0.018 & 0.50 & 0.0053 \\%\hline
600 & 0.53 & 0.034 & 0.50 & 0.015 & 0.50 & 0.0044 \\%\hline
700 & 0.53 & 0.029 & 0.50 & 0.013 & 0.50 & 0.0038 \\%\hline
800 & 0.53 & 0.026 & 0.50 & 0.011 & 0.50 & 0.0033 \\%\hline
900 & 0.53 & 0.023 & 0.50 & 0.010 & 0.50 & 0.0029 \\%\hline
1000 & 0.53 & 0.021 & 0.50 & 0.009 & 0.50 & 0.0026 \\%\hline
1100 & 0.53 & 0.019 & 0.50 & 0.008 & 0.50 & 0.0024 \\%\hline
1200 & 0.53 & 0.017 & 0.50 & 0.008 & 0.51 & 0.0022 \\%\hline
1300 & 0.53 & 0.016 & 0.50 & 0.007 & 0.51 & 0.0020 \\%\hline
1400 & 0.53 & 0.015 & 0.50 & 0.006 & 0.51 & 0.0019 \\\hline
\end{tabular}
%\end{center}
\par
\end{table}