\begin{table}%t2
    \caption{\label{hegra_numbers}HEGRA IACT system direction reconstruction algorithms and cuts 
      used for the \eee\  signal search and for the spectral analysis, 
      respectively.
      The resulting numbers for 4~selected subsets are given:
      "2000/2001'' including all data used for the first 5.2~$\sigma$
      detection,
      "May 2002'' only using data from the nights May~18/19 and 
      May~19/20, 2002 (see Fig.~\ref{1ES1959_onoff}).
      The "low state'' resp.~"high state'' data sets are used for
      the spectral analysis (see text and Fig.~\ref{1ES1959_spectra}).      }
%\centering
\par
      \begin{tabular}{lll} 
      \hline \hline\noalign{\smallskip}
                                                   &     signal          &   spectrum \\
        \noalign{\smallskip}
        \hline\noalign{\smallskip}
        stereo algorithm                           &     \#3             &   \#3      \\
        number of images per event \quad           &     $\ge$3         &   $\ge$3  \\
        shape cut on~~{\it  mscw}                   &     $<$1.1         &   $<$1.1      \\
        angular distance cut~~$\Theta^2 $          &     $<$0.012 deg$^2$   &  $<$0.014 deg$^2$ \\
        $\alpha = A_{\mbox{\tiny ON}} / A_{\mbox{\tiny OFF}}$ & 0.0758   &   0.1429   \\
       \noalign{\smallskip} \hline \noalign{\smallskip}
                    &  \underline{\it  2000/2001}  &  \underline{"{\it  low state}''}\  \\
        ${T}_{\mbox{\tiny obs}}$              &       93.8~h       &    149.6~h  \\
        $N_{\mbox{\tiny ON}}$                      &      354            &    585       \\
        $N_{\mbox{\tiny OFF}}$                     &     3441            &   1960       \\
        $N_{\mbox{\tiny $\gamma$-candidates}}$     &       93 $\pm$ 19   &    305 $\pm$ 25  \\
        significance ($\sigma$)                    &        5.2          &     14.6     \\
       \noalign{\smallskip} \hline\noalign{\smallskip}
                    &  \underline{\it  May 2002}  &  \underline{"{\it  high state}''}  \\
        ${T}_{\mbox{\tiny obs}}$              &      3.6~h          &      8.5~h  \\
        $N_{\mbox{\tiny ON}}$                      &    179               &    275   \\
        $N_{\mbox{\tiny OFF}}$                     &    131               &    141   \\
        $N_{\mbox{\tiny $\gamma$-candidates}}$     &    169 $\pm$ 13      &    255 $\pm$ 17 \\
        significance ($\sigma$)                    &     23.4             &     25.5 \\ 
         \hline
      \end{tabular}
    \end{table}