\begin{table}%t2
 \caption{\label{tab2}The measurements for the excess emissions
of the $\mbox{Na~{\sc i}}$~ D$_{1}$, D$_{2}$, H$_{\alpha}$, and
$\mbox{Ca~{\sc ii}}$~IRT lines.}
\small%\centerline
{
\begin{tabular}{lccccccc}
\hline \hline \noalign{\smallskip}
\multicolumn{1}{c}{Phase} &
\multicolumn{1}{c}{$EW _{\rm Na_{I}D_{1}}$(${\AA}$)}&
\multicolumn{1}{c}{$EW _{\rm Na_{I}D_{2}}$(${\AA}$)}&
\multicolumn{1}{c}{$EW _{\rm H_{\alpha}}$(${\AA}$)}&
\multicolumn{1}{c}{$EW _{\rm Ca_{II}~8498}$(${\AA}$)}&
\multicolumn{1}{c}{$EW _{\rm Ca_{II}~8542}$(${\AA}$)}&
\multicolumn{1}{c}{$EW _{\rm Ca_{II}~8662}$(${\AA}$)}&
\multicolumn{1}{c}{$EW _{\rm 8542}$/EW$_{8498}$}\\
\noalign{\smallskip}\hline
0.171&0.067~$\pm$~0.006 & -- & 1.053~$\pm$~0.114&0.798~$\pm$~0.002 & 1.224~$\pm$~0.025&0.932~$\pm$~0.016&1.534~$\pm$~0.027\\
0.424&0.149~$\pm$~0.020&0.066~$\pm$~0.014&1.503~$\pm$~0.020&0.796~$\pm$~0.025&1.361~$\pm$~0.036&0.986~$\pm$~0.007&1.710~$\pm$~0.008\\
0.941&0.080~$\pm$~0.008&0.049~$\pm$~0.003&1.908~$\pm$~0.004&0.827~$\pm$~0.002&1.425~$\pm$~0.039&1.030~$\pm$~0.017&1.723~$\pm$~0.043\\
%\hline
0.092&0.185~$\pm$~0.001&0.090~$\pm$~0.005&1.284~$\pm$~0.005&0.706~$\pm$~0.027&1.328~$\pm$~0.083&0.949~$\pm$~0.012&1.881~$\pm$~0.046\\
0.857&0.212~$\pm$~0.010&0.121~$\pm$~0.015&1.607~$\pm$~0.039&0.752~$\pm$~0.032&1.294~$\pm$~0.045&0.969~$\pm$~0.012&1.721~$\pm$~0.013\\
0.094&0.203~$\pm$~0.004&0.104~$\pm$~0.013&1.309~$\pm$~0.019&0.694~$\pm$~0.026&1.318~$\pm$~0.067&0.948~$\pm$~0.002&1.899~$\pm$~0.025\\
0.345&0.150~$\pm$~0.023&0.101~$\pm$~0.003&1.004~$\pm$~0.011&0.697~$\pm$~0.013&1.254~$\pm$~0.050&0.921~$\pm$~0.011&1.799~$\pm$~0.038\\
%\hline
0.416&0.234~$\pm$~0.017&0.052~$\pm$~0.004&0.653~$\pm$~0.010&0.718~$\pm$~0.019&1.160~$\pm$~0.038&0.789~$\pm$~0.010&1.616~$\pm$~0.010\\
0.432&0.194~$\pm$~0.001&0.052~$\pm$~0.010&0.637~$\pm$~0.013&0.726~$\pm$~0.002&1.204~$\pm$~0.019&0.830~$\pm$~0.006&1.658~$\pm$~0.022\\
0.663&--&--&0.880~$\pm$~0.030&0.724~$\pm$~0.017&1.202~$\pm$~0.013&0.935~$\pm$~0.003&1.660~$\pm$~0.021\\
0.677&--&--&0.934~$\pm$~0.031&0.689~$\pm$~0.019&1.192~$\pm$~0.007&0.967~$\pm$~0.009&1.730~$\pm$~0.038\\
0.687&--&--&0.836~$\pm$~0.010&0.689~$\pm$~0.021&1.176~$\pm$~0.005&0.969~$\pm$~0.015&1.707~$\pm$~0.045\\
%\hline
0.241&0.068~$\pm$~0.005&0.031~$\pm$~0.002&0.583~$\pm$~0.002&0.688~$\pm$~0.015&1.367~$\pm$~0.018&0.921~$\pm$~0.010&1.987~$\pm$~0.017\\
0.276&--&--&0.576~$\pm$~0.014&0.759~$\pm$~0.019&1.330~$\pm$~0.012&0.910~$\pm$~0.002&1.752~$\pm$~0.028\\
0.743&0.105~$\pm$~0.004&0.072~$\pm$~0.004&1.663~$\pm$~0.005&0.716~$\pm$~0.041&1.391~$\pm$~0.037&0.990~$\pm$~0.004&1.943~$\pm$~0.060\\
0.780&0.087~$\pm$~0.002&0.074~$\pm$~0.006&1.715~$\pm$~0.005&0.706~$\pm$~0.026&1.349~$\pm$~0.038&0.991~$\pm$~0.028&1.911~$\pm$~0.017\\
%\hline
0.753&0.123~$\pm$~0.008&0.092~$\pm$~0.008&1.761~$\pm$~0.036&0.726~$\pm$~0.038&1.431~$\pm$~0.021&1.011~$\pm$~0.010&1.971~$\pm$~0.074\\
0.794&--&--&1.760~$\pm$~0.013&0.678~$\pm$~0.031&1.426~$\pm$~0.003&0.992~$\pm$~0.023&2.103~$\pm$~0.092\\
0.257&--&--&0.775~$\pm$~0.016&0.710~$\pm$~0.011&1.368~$\pm$~0.030&0.933~$\pm$~0.003&1.927~$\pm$~0.012\\
0.294&--&--&0.850~$\pm$~0.035&0.748~$\pm$~0.016&1.370~$\pm$~0.031&0.912~$\pm$~0.020&1.832~$\pm$~0.002\\
\hline
\end{tabular}}
\smallskip
``--'' No emission is detected.
\end{table}