\begin{table}%t3
%\centering
\par
\caption{The mean value and the root mean square of the $V$, $B$ and $I$
residuals of the common stars of contiguous chips. }\label{dmag}
\begin{tabular}{ccccccc} 
\hline
\hline
Chips& $<\Delta V>$ &rms & $<\Delta B> $& rms& $<\Delta I>$ &rms\\
 \hline
1-2 &  0.051 &  0.023&   0.043 &  0.025 &  0.054 &  0.047\\
1-8 & $-$0.006 &  0.027&   0.033 &  0.072 &  0.009 &  0.020\\
2-3 &  0.005 &  0.036&   0.004 &  0.055 & $-$0.018 &  0.031\\
2-7 &  0.021 &  0.070&   0.043 &  0.049 &  0.014 &  0.051\\
3-6 &  0.046 &  0.021&   0.035 &  0.036 &  0.034 &  0.017\\
6-7 & $-$0.032 &  0.029&  $-$0.071 &  0.055 & $-$0.023 &  0.026\\
7-8 & $-$0.065 &  0.039&  $-$0.015 &  0.043 & $-$0.043 &  0.027\\
\hline
\end{tabular}
 \end{table}