\begin{table}%t7
\par
\caption {\label{table:effcollstr-10}Effective Collision Strengths for transitions between the first 5~$j$-levels of \ion{Mg}{v} at selected temperatures$^a$.}  
%\centerline
 {\begin{tabular}{c@{\extracolsep{20pt}}l@{\extracolsep{15pt}}l@{\extracolsep{15pt}}l@{\extracolsep{15pt}}l@{\extracolsep{15pt}}l@{\extracolsep{15pt}}l@{\extracolsep{15pt}}l@{\extracolsep{15pt}}l@{\extracolsep{15pt}}l@{\extracolsep{15pt}}l}
\hline\hline\\[-3mm] 
\multicolumn{1}{l}{} & \multicolumn{10}{c}{Transition index$^b$}\\[5pt] \cline{2-11} 
$\log_{10} T_{\rm e}$(K) & \multicolumn{1}{l}{1--2} & \multicolumn{1}{l}{1--3} & \multicolumn{1}{l}{1--4} & \multicolumn{1}{l}{1--5} & \multicolumn{1}{l}{2--3} & \multicolumn{1}{l}{2--4} & \multicolumn{1}{l}{2--5} & \multicolumn{1}{l}{3--4} & \multicolumn{1}{l}{3--5} & \multicolumn{1}{l}{4--5}\\   
\hline  
3.0  & 5.56$^{-1}$ & 1.42$^{-1}$ & 6.63$^{-1}$ & 7.46$^{-2}$ & 2.03$^{-1}$ & 4.15$^{-1}$ & 5.19$^{-2}$ & 1.45$^{-1}$ & 2.11$^{-2}$ & 1.64$^{-1}$ \\
3.2  & 5.94$^{-1}$ & 1.62$^{-1}$ & 6.73$^{-1}$ & 8.44$^{-2}$ & 2.07$^{-1}$ & 4.20$^{-1}$ & 5.67$^{-2}$ & 1.45$^{-1}$ & 2.24$^{-2}$ & 1.69$^{-1}$ \\
3.4  & 6.63$^{-1}$ & 1.97$^{-1}$ & 6.84$^{-1}$ & 9.58$^{-2}$ & 2.22$^{-1}$ & 4.27$^{-1}$ & 6.22$^{-2}$ & 1.47$^{-1}$ & 2.39$^{-2}$ & 1.72$^{-1}$ \\
3.6  & 7.58$^{-1}$ & 2.32$^{-1}$ & 6.95$^{-1}$ & 1.03$^{-1}$ & 2.49$^{-1}$ & 4.34$^{-1}$ & 6.62$^{-2}$ & 1.49$^{-1}$ & 2.50$^{-2}$ & 1.72$^{-1}$ \\
3.8  & 8.59$^{-1}$ & 2.56$^{-1}$ & 7.05$^{-1}$ & 1.05$^{-1}$ & 2.85$^{-1}$ & 4.40$^{-1}$ & 6.75$^{-2}$ & 1.50$^{-1}$ & 2.55$^{-2}$ & 1.73$^{-1}$ \\
4.0  & 9.29$^{-1}$ & 2.65$^{-1}$ & 7.20$^{-1}$ & 1.01$^{-1}$ & 3.17$^{-1}$ & 4.48$^{-1}$ & 6.64$^{-2}$ & 1.53$^{-1}$ & 2.52$^{-2}$ & 1.75$^{-1}$ \\
4.2  & 9.44$^{-1}$ & 2.58$^{-1}$ & 7.37$^{-1}$ & 9.51$^{-2}$ & 3.29$^{-1}$ & 4.58$^{-1}$ & 6.40$^{-2}$ & 1.56$^{-1}$ & 2.46$^{-2}$ & 1.81$^{-1}$ \\
4.4  & 9.34$^{-1}$ & 2.51$^{-1}$ & 7.43$^{-1}$ & 8.99$^{-2}$ & 3.26$^{-1}$ & 4.60$^{-1}$ & 6.17$^{-2}$ & 1.56$^{-1}$ & 2.39$^{-2}$ & 1.94$^{-1}$ \\
4.6  & 9.52$^{-1}$ & 2.58$^{-1}$ & 7.31$^{-1}$ & 8.69$^{-2}$ & 3.23$^{-1}$ & 4.52$^{-1}$ & 6.03$^{-2}$ & 1.53$^{-1}$ & 2.35$^{-2}$ & 2.15$^{-1}$ \\
4.8  & 9.93$^{-1}$ & 2.74$^{-1}$ & 7.10$^{-1}$ & 8.59$^{-2}$ & 3.24$^{-1}$ & 4.38$^{-1}$ & 6.00$^{-2}$ & 1.49$^{-1}$ & 2.34$^{-2}$ & 2.42$^{-1}$ \\
5.0  & 1.01$^{}$ & 2.81$^{-1}$ & 6.88$^{-1}$ & 8.53$^{-2}$ & 3.24$^{-1}$ & 4.24$^{-1}$ & 6.00$^{-2}$ & 1.44$^{-1}$ & 2.33$^{-2}$ & 2.66$^{-1}$ \\
5.2  & 9.89$^{-1}$ & 2.70$^{-1}$ & 6.64$^{-1}$ & 8.39$^{-2}$ & 3.16$^{-1}$ & 4.10$^{-1}$ & 5.90$^{-2}$ & 1.39$^{-1}$ & 2.29$^{-2}$ & 2.78$^{-1}$ \\
5.4  & 9.19$^{-1}$ & 2.46$^{-1}$ & 6.32$^{-1}$ & 8.06$^{-2}$ & 2.98$^{-1}$ & 3.90$^{-1}$ & 5.66$^{-2}$ & 1.32$^{-1}$ & 2.17$^{-2}$ & 2.74$^{-1}$ \\
5.6  & 8.22$^{-1}$ & 2.15$^{-1}$ & 5.90$^{-1}$ & 7.51$^{-2}$ & 2.72$^{-1}$ & 3.64$^{-1}$ & 5.24$^{-2}$ & 1.23$^{-1}$ & 1.99$^{-2}$ & 2.60$^{-1}$ \\
5.8  & 7.22$^{-1}$ & 1.85$^{-1}$ & 5.38$^{-1}$ & 6.79$^{-2}$ & 2.42$^{-1}$ & 3.31$^{-1}$ & 4.71$^{-2}$ & 1.11$^{-1}$ & 1.76$^{-2}$ & 2.43$^{-1}$ \\
6.0  & 6.34$^{-1}$ & 1.61$^{-1}$ & 4.81$^{-1}$ & 5.98$^{-2}$ & 2.10$^{-1}$ & 2.95$^{-1}$ & 4.14$^{-2}$ & 9.86$^{-2}$ & 1.52$^{-2}$ & 2.31$^{-1}$ \\
6.2  & 5.55$^{-1}$ & 1.43$^{-1}$ & 4.18$^{-1}$ & 5.11$^{-2}$ & 1.79$^{-1}$ & 2.56$^{-1}$ & 3.53$^{-2}$ & 8.48$^{-2}$ & 1.28$^{-2}$ & 2.23$^{-1}$ \\
6.4  & 4.81$^{-1}$ & 1.26$^{-1}$ & 3.52$^{-1}$ & 4.22$^{-2}$ & 1.48$^{-1}$ & 2.16$^{-1}$ & 2.90$^{-2}$ & 7.07$^{-2}$ & 1.04$^{-2}$ & 2.19$^{-1}$ \\
6.6  & 4.12$^{-1}$ & 1.12$^{-1}$ & 2.88$^{-1}$ & 3.38$^{-2}$ & 1.20$^{-1}$ & 1.77$^{-1}$ & 2.31$^{-2}$ & 5.78$^{-2}$ & 8.22$^{-3}$ & 2.17$^{-1}$ \\
6.8  & 3.54$^{-1}$ & 9.94$^{-2}$ & 2.35$^{-1}$ & 2.68$^{-2}$ & 9.72$^{-2}$ & 1.44$^{-1}$ & 1.82$^{-2}$ & 4.71$^{-2}$ & 6.42$^{-3}$ & 2.15$^{-1}$ \\
7.0  & 3.09$^{-1}$ & 9.01$^{-2}$ & 1.93$^{-1}$ & 2.15$^{-2}$ & 7.99$^{-2}$ & 1.19$^{-1}$ & 1.45$^{-2}$ & 3.90$^{-2}$ & 5.06$^{-3}$ & 2.14$^{-1}$ \\
 \hline
\end{tabular}}
\par
\smallskip
$^a$ A superscript indicates the power of 10 with which the number must be multiplied i.e., $a^{-n}=a \times 10^{-n}$.\\
$^b$ Initial and final levels are given in Table~\ref{table:j-index}.
\end{table}