\begin{table}%t1
%\centering
\par
\caption{\label{table:frequencyanalysis}Results of our frequency analysis of
  \object{HS~2201+2610}. }
$$ \begin{tabular}{cllr@{}lr@{}lr@{}lr@{}lr@{}lr@{}lr@{}l}
\hline\hline
\multicolumn{5}{p{43mm}}{}&\multicolumn{4}{p{40mm}}{Calar alto data (2006)}&
\multicolumn{4}{p{40mm}}{OHP/LOI Data (2003)}&\multicolumn{4}{p{40mm}}{Mean
  solution (2000--2007)}\\
\hline    
ID & Type &$l$&
\multicolumn{2}{l}{Period}&\multicolumn{2}{l}{Frequency}&\multicolumn{2}{l}{Amplitude}&
\multicolumn{2}{l}{Frequency}&\multicolumn{2}{l}{Amplitude}&
\multicolumn{2}{l}{Frequency}&\multicolumn{2}{l}{Amplitude}\\
   &      &   &
\multicolumn{2}{l}{[s]}&\multicolumn{2}{l}{[$\mu$Hz]}&\multicolumn{2}{l}{[mmi]}&
\multicolumn{2}{l}{[$\mu$Hz]}&\multicolumn{2}{l}{[mmi]}    &
\multicolumn{2}{l}{[$\mu$Hz]}&\multicolumn{2}{l}{[mmi]}    \\
\hline                    
f1  & $p$ &0& 349.&5 & 2861.&2 & 6.&6 & 2860.&9  &12.&3 & 2860.&9387 & 10.&4\\
f2  & $p$ &1& 354.&2 & 2823.&7 & 3.&3 & 2824.&1  & 3.&7 & 2824.&0965 &  4.&2\\
f3  & $p$ &1& 347.&1 & 2880.&8 & 1.&5 & 2880.&7  & 1.&5 & 2880.&6842 &  0.&7\\
 f4 & $p$ &2&     &  &      &  &   &  &      &   &   &  & 2921.&8463 &  0.&6\\
($\approx$ f4 alias)&  & & 344.&1 & 2906.&3 & 0.&4 &      &   &   &  &      &      &    & \\
(f5)& $p$ &2& \\ 
(f5 alias)& & & 366.&9 & 2725.&9 & 0.&8 &      &   &   &  &      &      &    & \\
(f6)    & $p$ & &     &  &      &  &   &  &      &   &   &  &(2882.&0039 &  0.&5)\\
f7  & $g$ & &3255.&6 &  307.&2 & 1.&5 &  306.&8  & 1.&5 &      &      &    & \\
\hline                  
\end{tabular}
$$
\end{table}