\begin{table}%t1
%\centering
\par
\caption{\label{tab:parameter-space}Impact parameters and aggregate properties explored in this
  study.}
\begin{tabular}{c c c c c }
\hline\hline
$v$ [m/s] & \tpsig & $b/b_{\rm max}$ & $m_1/m_2$ \\
(1) & (2) & (3) & (4) \\
\hline
$0.01$   & 0.07  & 0.0   & $10^{-3}$  \\ 
$0.05$   & 0.09  & 0.25  & $5\ep{-2}$ \\ 
$0.1$    & 0.122 & 0.5   & $1\ep{-1}$ \\ 
$0.2$    & 0.13  & 0.75  & $2\ep{-1}$ \\ 
$0.3$    & 0.155 & 0.875 & $4\ep{-1}$ \\ 
$0.5$    & 0.16  & 0.95  & $6\ep{-1}$ \\ 
$0.75$   & 0.189 &       & $8\ep{-1}$ \\
$1.0$    & 0.251 &       & $1$        \\ 
$2.0$    &       &       &            \\
$4.0$    &       &       &            \\ 
$6.0$    &       &       &            \\ 
$8.0$    &       &       &            \\ 
$10.0$   &       &       &            \\
\hline
\end{tabular}
\end{table}