\begin{table}%t4
 \caption {\label{tab4}Parameters of
fitting equations for color$-$type relationships.}  
%\centerline
 {\begin{tabular}{crrrccc}
\hline\hline
Color & {\it a} & {\it b} & {\it c} & type & $R$ & Sensitivity \\
 &  &  &  & Range & & Index$^{{a}}$    \\
\hline
$r-i$ & 2.77242  & 0.01930 & $-$0.00355 & [10, 27.5] & 0.62  & 0.073 \\
$i-z$ & 0.89637  & 0.00812 & 0.00582  & [13, 25] & 0.89  & 0.225 \\
$i-J$ & 4.46097  & $-$0.12872 & 0.01099  & [10, 25] & 0.94  & 0.253 \\
$i-H$ & 2.68743  & 0.22692 & 0 & [10, 25] & 0.92  & 0.227 \\
$i-K$ & 2.04847  & 0.39856 & $-$0.00567 & [10, 25] & 0.90  & 0.200 \\
$z-J$ & 1.32530  & 0.10725 & 0 & [10, 13.5] & 0.59  & 0.107 \\
$z-J$ & 0.61620  & 0.10826 & 0 & [19, 26] & 0.81  & 0.107 \\
$z-H$ & 4.23705  & $-$0.31004 & 0.02038  & [10, 14] & 0.70  & 0.158 \\
$z-H$ & 4.60067  & $-$0.03962 & 0 & [17.5, 27.5] & 0.53  & 0.040 \\
$z-K$ & 3.93079  & $-$0.21325 & 0.01860  & [10, 14] & 0.72  & 0.235 \\
$z-K$ & 6.96601  & $-$0.13083 & 0 & [17.5, 27.5] & 0.72  & 0.080 \\
$H-K$ & 0.15050  & 0.03638 & 0 & [10, 15] & 0.40  & 0.040 \\
$H-K$ & 2.19557  & $-$0.08809 & 0 & [17, 25] & 0.66  & 0.088 \\
$J-H$ & 0.06224  & 0.06903 & 0 & [10,14] & 0.49  & 0.088 \\
$J-H$ & 5.58544  & $-$0.21707 & 0 & [20, 25] & 0.90  & 0.100 \\
\hline
\end{tabular}}
\par
\smallskip
Notes: the united polynomial fitting equation of color$-$spectral
type relationships is: ${\rm color}=a+b({\rm type})+c({\rm type})^{2}$, type~$=$~10 for
L0, 15 for L5, 20
for T0, 25 for T5;
$^{{a}}$ Sensitivity indices are the rates
of change of color ranges with spectral ranges covered by fitting
lines.
\end{table}