\begin{table}%t1
%%\centering

\par
\caption{\label{tab:compfinal} The $5\%$- significance levels of the corresponding hypothesis tests brought face to face with the identified 72~day period and its higher harmonics.}
\small  \begin{tabular}{cccccccc}
\hline\hline
\multicolumn{8}{c}{Lomb-Scargle}\\
%\hline
RXTE  & $5\%$- & SWIFT  & $5\%$- & MAGIC & $5\%$- & WHIPPLE & $5\%$- \\
Period [days] & level    & Period [days] & level & Period [days] & level &Period [days] & level \\
\hline
$72.2\pm 2.3$ & $0.074$   &  &  & &  &  &  \\
$35.0\pm 2.2$ & $0.072$      & $34.6\pm 2.8$ &  $0.16$      &               &                 &               &              \\
$22.9\pm 1.1$ & $0.036$      & $22.2\pm 1.0$ &  $0.057$     & $26.5\pm3.5$  & $1.4$          & $21.6\pm 2.4$ & $0.82$       \\
\hline
\multicolumn{8}{c}{SigSpec}        \\
%  \hline
RXTE          & $5\%$-     & SWIFT         & $5\%$-     & MAGIC         & $5\%$-  & WHIPPLE  & $5\%$-     \\
Period [days] & level & Period [days] & level & Period [days] & level & Period [days] & level       \\
\hline
$72.6\pm 4.3$ & $0.14$       &               &              &               &                &               &              \\
$36.9\pm 2.3$ & $0.073$      & $32.7\pm 0.5$ &  $0.029$     & $36.6\pm4.1$  & $0.88$         &               &              \\
$21.8\pm 1.2$ & $0.039$      & $21.6\pm 0.3$ &  $0.019$     & $22.4\pm3.5$  & $1.5$            & $21.1\pm 3.5$ & $1.1$        \\
\hline
\end{tabular}
\end{table}