\begin{table}%t1
%\centering
\par
\caption{\label{tab1}Counts accumulated in the PCA and HEXTE for each selection; the selections are numbered~1 to 11~starting from the HB end of the \mbox{Z-track}.}
\small \begin{tabular}{lrr}
\hline \hline  
Selection& PCA Count & HEXTE Count\\
\hline
1   &  $2.04\times 10^6$  &  $2.98\times 10^3$ \\
2   &  $4.30\times 10^6$  &  $6.38\times 10^3$\\
3   &  $10.23\times 10^6$  & $11.69\times 10^3$ \\
4   &  $4.69\times 10^6$  &  $6.66\times 10^3$ \\ 
5   &  $15.71\times 10^6$   & $15.16\times 10^3$ \\
6   &  $2.17\times 10^6$  &  $3.81\times 10^3$ \\
7   &  $9.78\times 10^6$  & $10.30\times 10^3$ \\
8   &  $6.78\times 10^6$  &  $6.17\times 10^3$ \\
9   &  $3.05\times 10^6$  &  $4.52\times 10^3$ \\
10  &  $1.63\times 10^6$  &  $2.08\times 10^3$ \\
11  &  $1.74\times 10^6$  &  $1.89\times 10^3$ \\
\hline
\end{tabular}
\end{table}