\begin{table}%T2
\caption{\label{tab:tab2}Strongest RGS lines of MP~Mus.}
\small%\centerline
$${
\begin{tabular}{rrlcr@{$~\pm~$}l}
\hline\hline\noalign{\smallskip}
 \multicolumn{1}{c}{$\lambda_{\rm obs}^{a}$} & \multicolumn{1}{c}{$\lambda_{\rm pred}^{a}$} & \multicolumn{1}{c}{Ion} & $\log T_{\rm max}^{b}$ & \multicolumn{2}{c}{$(F \pm \sigma F)^{c}$} \\
\noalign{\smallskip}\hline
            12.14 &             12.13 &                      \ion{Ne}{x} \ion{Ne}{x} \ion{Fe}{xvii}  &   6.80 &                                         22.2 &   3.4 \\
            12.30 &             12.28 &                                \ion{Fe}{xxi} \ion{Fe}{xvii}  &   7.00 &                                          5.5 &   2.6 \\
            12.86 &             12.85 &         \ion{Fe}{xx} \ion{Fe}{xx} \ion{Fe}{xx} \ion{Fe}{xx}  &   7.00 &                                          3.4 &   2.3 \\
            13.46 &             13.45 &                                  \ion{Ne}{ix} \ion{Fe}{xix}  &   6.60 &                                         21.1 &   3.7 \\
            13.55 &             13.52 &                                  \ion{Ne}{ix} \ion{Fe}{xix}  &   6.90 &                                          8.6 &   3.1 \\
            13.73 &             13.70 &                                                \ion{Ne}{ix}  &   6.60 &                                          8.8 &   2.8 \\
            14.19 &             14.21 &                             \ion{Fe}{xviii} \ion{Fe}{xviii}  &   6.90 &                                          3.3 &   1.7 \\
            15.02 &             15.01 &                                              \ion{Fe}{xvii}  &   6.70 &                                         11.8 &   2.9 \\
            15.21 &             15.18 &    \ion{O}{viii} \ion{O}{viii} \ion{Fe}{xix} \ion{Fe}{xvii}  &   6.50 &                                          7.6 &   2.5 \\
            16.02 &             16.01 & \ion{O}{viii} \ion{O}{viii} \ion{Fe}{xviii} \ion{Fe}{xviii}  &   6.50 &                                         22.6 &   6.3 \\
            16.78 &             16.78 &                                              \ion{Fe}{xvii}  &   6.70 &                                          8.8 &   1.8 \\
            17.08 &             17.05 &                               \ion{Fe}{xvii} \ion{Fe}{xvii}  &   6.70 &                                         17.2 &   3.0 \\
            18.65 &             18.63 &                                                \ion{O}{vii}  &   6.30 &                                          8.7 &   2.6 \\
            18.98 &             18.97 &                                 \ion{O}{viii} \ion{O}{viii}  &   6.50 &                                         65.6 &   4.7 \\
            21.60 &             21.60 &                                                \ion{O}{vii}  &   6.30 &                                         30.2 &   4.0 \\
            21.81 &             21.80 &                                                \ion{O}{vii}  &   6.30 &                                         27.9 &   7.9 \\
            22.10 &             22.10 &                                                \ion{O}{vii}  &   6.30 &                                          8.0 &   2.8 \\
            24.80 &             24.78 &                                   \ion{N}{vii} \ion{N}{vii}  &   6.30 &                                         10.5 &   2.8 \\
            28.49 &             28.47 &                                     \ion{C}{vi} \ion{C}{vi}  &   6.20 &                                          3.8 &   1.3 \\
            33.74 &             33.73 &                                     \ion{C}{vi} \ion{C}{vi}  &   6.10 &                                         16.4 &   5.2 \\
\hline
\end{tabular}}$$
\smallskip
$^a$~Observed and predicted (APED database) wavelengths (\AA).
$^b$~Temperature (K) of maximum emissivity.
$^c$~Line fluxes (${\rm 10^{-6}~ph~s^{-1}~cm^{-2}}$) with uncertainties at the 68\% confidence level.
\end{table}