\begin{table}%t1
\small
%\centering
   \caption{Estimated values of
$t^2$, $T_0$, and $\theta x^2$ for $T_{\rm c}=100$, 1000, and 4000~K for a
sample of \ion{H}{ii} regions. $T_{0,{\rm E}}$ and $t^2_{\rm E}$ are taken from
Esteban et~al. (\cite{e02}). The numbers in parentheses are values 
derived by GB05 and included here for comparison.\label{est}}
\begin{tabular}{lcccc}
\hline\hline
{Object}        &  NGC~604  & NGC~5461 &  NGC~5471 &  NGC~2363 \\
\hline
$t^2_{\rm E}$   &  0.027 & 0.041 & 0.074 &  0.128 \\
$T_{0,{\rm E}}$ &  8150 &     8600 &  14100& 15700 \\
$T$([\ion{O}{iii}])($t^2_{\rm E}$,$T_{0,{\rm E}}$) & 9052 & 9943 &15~913 & 18~528\\
$T$(\ion{H}{i})($t^2_{\rm E}$,$T_{0,{\rm E}}$) & 7783  & 8011 & 12~358 & 12~344\\
$(t^2)_{100}$   &  0.00013  &  0.00016  &  0.00009  & 0.00013\\
$(t^2)_{1000}$  &  0.00413  &  0.00053  &  0.00312  & 0.00429\\
$(t^2)_{4000}$  &  0.02511  &  0.03503  &  0.02401  & 0.03540\\
$(T_0)_{100}$   &  9051     &  9941     &  15~911    & 18~526  \\
$(T_0)_{1000}$  &  9011     &  9884     &  15~860    & 18~445 \\
$(T_0)_{4000}$  &  8518     &  9370     &  15~413    & 17~719 \\
$(\theta x^2)_{100}$ & 0.00013(0.028) & 0.00017(0.042) &0.00010(0.075) &0.00013(0.130)\\
$(\theta x^2)_{1000}$& 0.00522(0.035)  &0.00659(0.052) &0.00356(0.086) &0.00480(0.146) \\
$(\theta x^2)_{4000}$& 0.08690(0.10)   &0.10~664(0.14)  &0.04378(0.14)  &0.05905(0.23) \\
\hline
\end{tabular}
\end{table}