\begin{table}%t15
\caption{\label{table15}A comparison of the results obtained by the interactive and the automatic
method (upper and lower parts of the table, respectively) for the 8~selected months during 1998$-$1999, see also Tables~\ref{table1} and~\ref{table2}.}
%\centering
\par
\begin{tabular}{lllll}
\hline \hline \noalign{\smallskip}
$N$   &$A \pm M_A$      &$B \pm M_B$      &$C \pm M_C$      & Remark     \\
\hline
1253  &$14.62 \pm 0.03$&$-3.36 \pm 0.09$& 0              &  1 \\
1253  &$14.54 \pm 0.04$&$-2.31 \pm 0.30$&$-1.53 \pm 0.41$&  2 \\
1253  &$14.52 \pm 0.03$&$-1.98 \pm 0.05$&$-1.98 \pm 0.05$&  3 \\
\hline
3473  &$14.53 \pm 0.02$&$-2.98 \pm 0.08$& 0              &  4 \\
3473  &$14.49 \pm 0.03$&$-2.53 \pm 0.22$&$-0.73 \pm 0.33$&  5 \\
3473  &$14.43 \pm 0.02$&$-1.81 \pm 0.05$&$-1.81 \pm 0.05$&  6 \\
\hline
\end{tabular}
\tablefoot {1. 2nd filter, $C=0$, interactive method. 2.~2nd filter, $C\ne0$, interactive method. 3.~2nd filter, $B=C$, interactive method. 4.~2nd filter, $C=0$, automatic method. 5.~2nd filter, $C\ne0$, automatic method. 6.~2nd filter, $B=C$, automatic method.}
\end{table}