\begin{table}%t3
\caption{Stars of the investigated open clusters with peculiar $\Delta a$-values;
No.~17 of~NGC 6756 is most probably an unreddened foreground star.}
\label{results}
%\centering
\par
%{\tiny
\begin{tabular}{crrrrcccccccccc}
\hline  \hline
Cluster & 
\multicolumn{1}{c}{$No_{1}$} & \multicolumn{1}{c}{$No_{2}$} & 
\multicolumn{1}{c}{$X$} & \multicolumn{1}{c}{$Y$} &
\multicolumn{1}{c}{$V$}&\multicolumn{1}{c}{$a$}&\multicolumn{1}{c}{$\sigma$}&
\multicolumn{1}{c}{$(g_{1}-y)$}&\multicolumn{1}{c}{$\sigma$}&
\multicolumn{1}{c}{$\Delta a$}&
\multicolumn{1}{c}{$(B-V)$}&\multicolumn{1}{c}{$\Delta a$} &
\multicolumn{1}{c}{$(b-y)$}&\multicolumn{1}{c}{$\Delta a$} \\   
\hline
NGC 6705
& 51	& 7730	& 85.1	& 419.6	& 11.84 &	0.695	& 0.005	& $-$0.558 &	0.006	& +0.045	&
+0.383	& +0.046	\\
& 56	& 7777	& 91.2	& 429.9	& 13.18 &	0.586	& 0.010	& $-$0.571 &	0.005	& $-$0.059	&
+0.384	& $-$0.063	\\
& 215	& 8157	& 267.5	& 520.4	& 12.00 &	0.674	& 0.007	& $-$0.596 &	0.008	& +0.037	&
+0.380	& +0.026	\\
NGC 6756
& (17)	& 33	& 120.0	& 176.3	& 14.91 &	0.737	& 0.006	& $-$0.238 &	0.006	& +0.052	&
& & +0.661	& +0.051	\\
& 46	& 24	& 234.9	& 233.4	& 14.51 &	0.741	& 0.009	& $-$0.218 &	0.008	& +0.049	&
& & +0.670	& +0.053	\\
& 52	& 66	& 256.5	& 440.6	& 15.74 &	0.629	& 0.012	& $-$0.209 &	0.011	& $-$0.067	&
& & +0.706	& $-$0.067	\\
\hline
\\
\multicolumn{13}{l}{Col. 1: cluster name;}\\
\multicolumn{13}{l}{Col. 2: notation sorted after $X$ and $Y$, respectively (Fig.~\ref{charts});}\\
\multicolumn{13}{l}{Col. 3: notation according to Sung et~al. (\cite{Sun99}; NGC~6705),
Delgado et~al. (\cite{Del97}; NGC~6756);} \\
\multicolumn{13}{l}{Cols. 4, 5: $X$ and $Y$ coordinates in the finding charts (Fig.~\ref{charts});} \\
\multicolumn{13}{l}{Col. 6: Johnson $V$ magnitude;} \\
\multicolumn{13}{l}{Cols. 7, 8: mean $a$-index and its standard deviation;} \\
\multicolumn{13}{l}{Cols. 9, 10: mean $(g_{1}-y)$ value and its standard deviation;} \\
\multicolumn{13}{l}{Col. 11: deviation from cluster line 
 $a_{0}$~=~$a$~+~$b$$\cdot(g_{1}-y)$ using the
 corresponding constants as listed in Table~\ref{all_res};} \\
\multicolumn{13}{l}{Col. 12: $(B-V)$ from the literature;} \\
\multicolumn{13}{l}{Col. 13: deviation from cluster line 
$a_{0}$~=~$a$~+~$b$$\cdot(B-V)$ using the
corresponding constants as listed in Table~\ref{all_res};} \\
\multicolumn{13}{l}{Col. 14: $(b-y)$ from Delgado et~al. (\cite{Del97});} \\
\multicolumn{13}{l}{Col. 15: deviation from cluster line 
$a_{0}$~=~$a$~+~$b$$\cdot(b-y)$ using the
corresponding constants as listed in Table~\ref{all_res}.} \\
\end{tabular}
%}
\end{table}