\begin{table}%t2
\caption{\label{relations} Overview of the temperature calibrations for the individual CP groups and photometric systems determined in this study.} 
\small
%\centerline
{
\begin{tabular}{l l l l l l l} 
\hline\hline \noalign{\smallskip}
CP type & System & Relation & Errors$^a$ & Restriction & $R$$^b$ & \# Stars\\ 
\hline 
CP1 & ${\it UBV}$    & $\theta_{\rm eff} = 0.527 + 0.515(B-V)_{0}$ & 0.003/0.013 &   & 0.993 & 24\\
    & ${\it Geneva}$ & $\theta_{\rm eff} = 0.632 + 0.640(B2-V1)_{0}$$^c$ & & $-0.160 \leq (B2-V1)_{0} \leq +0.730$ & &\\
    &          & direct use of $T_{XY}$  & & $(B2-V1)_{0} < -0.160$ & &\\    
	& ${uvby}\beta$  & direct use of $T_{{uvby}\beta}$ & & & &\\
CP2 & ${\it UBV}$    & $\theta_{\rm eff} = 0.541 + 0.389Q$ & 0.004/0.014 & $T_{\rm eff} \ga 9000$  & 0.982 & 29\\
    &          & $\theta_{\rm eff} = 0.572 + 1.177(B-V)_{0}$ & 0.011/0.089 & $-0.20 \leq (B-V)_{0} \leq -0.05$  & 0.948 & 21 \\
    &          & $\theta_{\rm eff} = 0.542 + 0.388(B-V)_{0}$ & 0.005/0.030 & $-0.05 \leq (B-V)_{0} \leq 0.40$  & 0.932 & 28 \\
    & ${\it Geneva}$ & $\theta_{\rm eff} = 0.835 + 0.458(B2-G)_{0}$$^d$ & & $T_{\rm eff} \la 9000$ & &\\
    &          & $T_{\rm eff}=1420 + 0.815T_{XY}$  & 280/0.023 & $T_{\rm eff} \ga 9000$ & 0.988 & 30\\
    & ${uvby}\beta$  & direct use of $T_{{uvby}\beta}$  &  & $T_{{uvby}\beta} < 9000 $ & & \\
    &   & $T_{\rm eff}=2090+0.756T_{{uvby}\beta}$ & 300/0.025 & $T_{{uvby}\beta} \geq 9000 $ & 0.984 & 31\\
    &              & $\theta_{\rm eff}=0.234+0.213[u-b]$ & 0.009/0.008 & $T_{\rm eff} \ga 9000$ & 0.980 & 33\\
CP3/4& ${\it Geneva}$ & $T_{\rm eff}=1120 + 0.892T_{XY}$ & 350/0.021 & & 0.990 & 37\\
CP3/4& ${uvby}\beta$ & $T_{\rm eff}=2230+0.809T_{{uvby}\beta}$ & 300/0.018 & & 0.991 & 37\\
CP3a  & ${\it UBV}$ & $\theta_{\rm eff} = 0.501 + 0.323Q$ & 0.007/0.026 & & 0.953 & 18\\
     &  ${uvby}\beta$  & $\theta_{\rm eff}=0.233+0.196[u-b]$ & 0.014/0.014 & & 0.965 & 17\\
CP3b/4  & ${\it UBV}$ & $\theta_{\rm eff} = 0.540 + 0.418Q$ & 0.009/0.017 & & 0.980 & 27\\
     &  ${uvby}\beta$  & $\theta_{\rm eff}=0.173+0.286[u-b]$ & 0.005/0.008 & & 0.989 & 27 \\
\hline 
\end{tabular}}
\smallskip
$^a$ Errors of the linear fits.\\
$^b$ Correlation Coefficient.\\
$^c$ Taken from \cite{HAU85}.\\
$^d$ Taken from \cite{HN82}.
\end{table}