\begin{table}%t7
\caption {\label{table:can-PLT}Canonical $PLT_{\rm e}$ relations for the selected  cases; $\log P = a + b\; \log(L/L_{\odot}) + c\; (\log T_{\rm e})$.}       
%\centering
\par
\begin{tabular}{l l l l l}       
\hline\hline
Case & $a$ & $b$ & $c$ & $\sigma$\\  
\hline 
Fundamental -- CANONICAL\\
I  ($std$)  & 10.725 $ \pm $ 0.180 & 0.687  $ \pm $  0.004  &--3.261  $ \pm $ 0.046 & 0.013 \\
II ($Z_{\rm low}$) & 10.475 $ \pm $ 0.320 &0.696   $ \pm $ 0.005   & --3.202 $ \pm $ 0.082 & 0.016 \\
III  ($Z_{\rm high}$)& 10.908 $ \pm $ 0.173 & 0.677 $ \pm $ 0.004  &--3.303  $ \pm $ 0.044 &0.009  \\
IV  ($Y_{\rm high}$) & 11.265 $ \pm $ 0.270  & 0.681 $ \pm $ 0.005  &--3.398  $ \pm $ 0.069 &0.013  \\
First Overtone -- CANONICAL\\
I  ($std$) & 10.827 $ \pm $ 0.393   &0.633 $ \pm $ 0.004   & --3.282 $ \pm $ 0.101 &0.003  \\
II ($Z_{\rm low}$)& 10.826 $ \pm $0.187  &0.631  $ \pm $ 0.002   & --3.279 $ \pm $ 0.048 &0.002   \\
III  ($Z_{\rm high}$)&11.033 $ \pm $0.404  &0.630  $ \pm $ 0.003   & --3.337 $ \pm $ 0.105 &0.004  \\
IV  ($Y_{\rm high}$) &10.897 $ \pm $0.347  &0.633  $ \pm $ 0.003   & --3.299 $ \pm $ 0.090 &0.002  \\
\hline
\end{tabular}
\end{table}