\begin{table}%t3
\caption{\label{table:3}\label{tab3}Limiting magnitudes of the fields in the on-band, off-band
  filter, and the $K$~constant.}
\small   
%\centering
\par
\begin{tabular}{c c c c}
\hline\hline
Field & $m_{\rm lim}(5007)$ & $m_{\rm b~lim}$ & $K$ \\
\hline                    
Core &  27.21 & 24.75 & 2.51 \\
FCJ  &  27.01 & 24.58 & 2.50 \\
LPC  &  27.52 & 25.40 & 3.02 \\
SUBC &  28.10 &  ---  & 2.49\\
\hline
LPRX &  27.49 & 25.05 & 3.02\\
LPE  &  27.83 & 25.93 & 3.02\\ 
LPS  &  27.69 & 25.91 & 3.02\\
LSF  &  28.20 & 26.32 & 2.51\\
RCN1 &  26.71 & 25.63 & 2.51 \\
SUB2 &  27.99 & 26.81 & 2.49\\
SUB3 &  27.74 & 26.65 & 2.49\\
\hline                  
\end{tabular}
\end{table}