\begin{table}%t6
%\centering
\par
\caption{\label{tab_energy_ca}The level energies (Ryd) of Ca$^{10+}$ from different calculations along with experimental data compiled in CHIANTI v6. }
\begin{tabular}{ccccccc}
\hline\hline\noalign{\smallskip}
ID  &   level~specification  & Exp.\tablefootmark{a}& AS  & FAC & CHIANTI\tablefootmark{b} & MCHF\tablefootmark{c} \\
\hline\noalign{\smallskip}
1 & ${\rm     2s^2 2p6  ~ ^1S_0}$ &             & 0.0000    & 0.0000    &    0.0000   &  0.0000  \\
   2 & ${\rm  2s^2 2p^5 3s ~ ^3P_2}$ &             & 25.5427   & 25.5586   &  25.4991    & 25.5486    \\
   3 & ${\rm  2s^2 2p^5 3s ~ ^3P_1}$ &  25.6149    & 25.6249   & 25.6435   &  25.5729    & 25.6289    \\
   4 & ${\rm  2s^2 2p^5 3s ~ ^3P_0}$ &  25.8053    & 25.8126   & 25.8279   &  25.7707    & 25.8205    \\
   5 & ${\rm  2s^2 2p^5 3s ~ ^1P_1}$ &  25.8791    & 25.8880   & 25.9076   &  25.8335    & 25.8924    \\
   6 & ${\rm  2s^2 2p^5 3p ~ ^3S_1}$ &             & 26.9270   & 26.9345   &  26.9288    & 26.9431    \\
   7 & ${\rm  2s^2 2p^5 3p ~ ^3D_2}$ &  27.1020    & 27.1604   & 27.1738   &  27.1112    & 27.1699    \\
   8 & ${\rm  2s^2 2p^5 3p ~ ^3D_3}$ &  27.1075    & 27.1613   & 27.1733   &  27.1152    & 27.1738    \\
   9 & ${\rm  2s^2 2p^5 3p ~ ^1P_1}$ &  27.1813    & 27.2386   & 27.2530   &  27.1819    & 27.2461    \\
  10 & ${\rm  2s^2 2p^5 3p ~ ^3P_2}$ &  27.2451    & 27.2975   & 27.3143   &  27.2340    & 27.3093    \\
  11 & ${\rm  2s^2 2p^5 3p ~ ^3D_1}$ &  27.2059    & 27.4268   & 27.4360   &  27.3743    & 27.4337    \\
  12 & ${\rm  2s^2 2p^5 3p ~ ^3P_0}$ &             & 27.4440   & 27.4562   &  27.3768    & 27.4516    \\
  13 & ${\rm  2s^2 2p^5 3p ~ ^1D_2}$ &  27.4893    & 27.5070   & 27.5222   &  27.4526    & 27.5210    \\
  14 & ${\rm  2s^2 2p^5 3p ~ ^3P_1}$ &  27.4884    & 27.5124   & 27.5273   &  27.4526    & 27.5239    \\
  15 & ${\rm  2s^2 2p^5 3p ~ ^1S_0}$ &             & 28.3886   & 28.4770   &  28.2369    & 28.2858    \\
  16 & ${\rm  2s^2 2p^5 3d ~ ^3P_0}$ &             & 29.1508   & 29.1489   &  29.1114    & 29.1602    \\
  17 & ${\rm  2s^2 2p^5 3d ~ ^3P_1}$ &  29.1543    & 29.1812   & 29.1767   &  29.1387    & 29.1880    \\
  18 & ${\rm  2s^2 2p^5 3d ~ ^3P_2}$ &             & 29.2418   & 29.2343   &  29.1934    & 29.2443    \\
  19 & ${\rm  2s^2 2p^5 3d ~ ^3F_4}$ &  29.2344    & 29.2760   & 29.2659   &  29.2152    & 29.2758    \\
  20 & ${\rm  2s^2 2p^5 3d ~ ^3F_3}$ &  29.2708    & 29.3104   & 29.3071   &  29.2499    & 29.3118    \\
  21 & ${\rm  2s^2 2p^5 3d ~ ^3F_2}$ &  29.4029    & 29.3772   & 29.3747   &  29.3082    & 29.3764    \\
  22 & ${\rm  2s^2 2p^5 3d ~ ^3D_3}$ &  29.3765    & 29.4265   & 29.4200   &  29.3474    & 29.4200    \\
  23 & ${\rm  2s^2 2p^5 3d ~ ^3D_1}$ &  29.5224    & 29.5622   & 29.5594   &  29.4777    & 29.5577    \\
  24 & ${\rm  2s^2 2p^5 3d ~ ^1D_2}$ &  29.6271    & 29.6026   & 29.5980   &  29.5342    & 29.6361    \\
  25 & ${\rm  2s^2 2p^5 3d ~ ^3D_2}$ &  29.5506    & 29.6395   & 29.6338   &  29.5624    & 29.6030    \\
  26 & ${\rm  2s^2 2p^5 3d ~ ^1F_3}$ &  29.6253    & 29.6428   & 29.6366   &  29.5707    & 29.6402    \\
  27 & ${\rm  2s^2 2p^5 3d ~ ^1P_1}$ &  29.9288    & 30.0051   & 30.0059   &  29.9060    & 29.9684    \\
  28 & ${\rm   2s 2p^6 3s  ~ ^3S_1}$ &             & 32.2654   & 32.2832   &  32.2261    &            \\
  29 & ${\rm   2s 2p^6 3s  ~ ^1S_0}$ &             & 32.5841   & 32.6044   &  32.5190    &            \\
  30 & ${\rm   2s 2p^6 3p  ~ ^3P_0}$ &             & 33.8113   & 33.8432   &  33.7971    & 33.6845    \\
  31 & ${\rm   2s 2p^6 3p  ~ ^3P_1}$ &  33.6523    & 33.8206   & 33.8495   &  33.8090    & 33.6960    \\
  32 & ${\rm   2s 2p^6 3p  ~ ^3P_2}$ &             & 33.8508   & 33.8733   &  33.8464    & 33.7327    \\
  33 & ${\rm   2s 2p^6 3p  ~ ^1P_1}$ &  33.7981    & 33.9839   & 34.0176   &  33.9338    & 33.8469    \\
  34 & ${\rm  2s^2 2p^5 4s ~ ^3P_2}$ &             & 34.2467   & 34.2404   &  34.1543    &            \\
  35 & ${\rm  2s^2 2p^5 4s ~ ^1P_1}$ &  34.4633    & 34.2563   & 34.2488   &  34.1817    &            \\
  36 & ${\rm  2s^2 2p^5 4s ~ ^3P_0}$ &             & 34.5012   & 34.4901   &  34.4277    &            \\
  37 & ${\rm  2s^2 2p^5 4s ~ ^3P_1}$ &  34.2082    & 34.5124   & 34.5026   &  34.4432    &            \\
  38 & ${\rm  2s^2 2p^5 4p ~ ^3S_1}$ &             & 34.7857   & 34.7746   &  34.7320    &            \\
  39 & ${\rm  2s^2 2p^5 4p ~ ^3D_3}$ &             & 34.8251   & 34.8174   &  34.7818    &            \\
  40 & ${\rm  2s^2 2p^5 4p ~ ^3D_2}$ &             & 34.8270   & 34.8207   &  34.7802    &            \\
  41 & ${\rm  2s^2 2p^5 4p ~ ^1P_1}$ &             & 34.8601   & 34.8562   &  34.8074    &            \\
  42 & ${\rm  2s^2 2p^5 4p ~ ^3P_2}$ &             & 34.8770   & 34.8745   &  34.8230    &            \\
  43 & ${\rm  2s^2 2p^5 4p ~ ^3P_0}$ &             & 35.0069   & 35.0089   &  34.9386    &            \\
  44 & ${\rm  2s^2 2p^5 4p ~ ^3D_1}$ &  35.0628    & 35.0862   & 35.0788   &  35.0446    &            \\
  45 & ${\rm  2s^2 2p^5 4p ~ ^1D_2}$ &             & 35.1190   & 35.1149   &  35.0754    &            \\
  46 & ${\rm  2s^2 2p^5 4p ~ ^3P_1}$ &             & 35.1201   & 35.1165   &  35.0691    &            \\
  47 & ${\rm  2s^2 2p^5 4p ~ ^1S_0}$ &             & 35.3734   & 35.4243   &  35.2506    &            \\
  48 & ${\rm  2s^2 2p^5 4d ~ ^3P_0}$ &             & 35.5595   & 35.5355   &  35.5085    &            \\
  49 & ${\rm  2s^2 2p^5 4d ~ ^3P_1}$ &             & 35.5757   & 35.5516   &  35.5230    &            \\
  50 & ${\rm  2s^2 2p^5 4d ~ ^3F_4}$ &  35.5245    & 35.5992   & 35.5751   &  35.5431    &            \\
  51 & ${\rm  2s^2 2p^5 4d ~ ^3P_2}$ &             & 35.6032   & 35.5793   &  35.5477    &            \\
  52 & ${\rm  2s^2 2p^5 4d ~ ^3F_3}$ &  35.5799    & 35.6149   & 35.5945   &  35.5586    &            \\
  53 & ${\rm  2s^2 2p^5 4d ~ ^1D_2}$ &  35.6233    & 35.6407   & 35.6217   &  35.5814    &            \\
  54 & ${\rm  2s^2 2p^5 4d ~ ^3D_3}$ &  35.5377    & 35.6551   & 35.6352   &  35.5932    &            \\
  55 & ${\rm  2s^2 2p^5 4f ~ ^3D_1}$ &             & 35.7173   & 35.7076   &  35.8297    &            \\
  56 & ${\rm  2s^2 2p^5 4f ~ ^3D_2}$ &             & 36.1749   & 35.7228   &  35.8340    &            \\
  57 & ${\rm  2s^2 2p^5 4d ~ ^3D_1}$ &  35.7126    & 35.7469   & 35.7315   &  35.6752    &            \\
  58 & ${\rm   2^s 2p^6 3d ~ ^3D_3}$ &             & 35.7674   & 35.7553   &  35.9009    &            \\
  59 & ${\rm  2s^2 2p^5 4f ~ ^1D_2}$ &             & 35.7339   & 35.8565   &  35.8347    &            \\
  60 & ${\rm  2s^2 2p^5 4d ~ ^3F_2}$ &  35.8730    & 35.8811   & 35.8612   &  35.8283    &            \\
  \hline
\end{tabular}
\tablefoot{{\tablefoottext{a} Experimental data are from the CHIANTI~v6 database -- see references therein.}  \tablefoottext{b}{Theoretical energies from %Zhang et~al. (
\citet{ZSC87}.} \tablefoottext{c}{MCHF data is available from the website: \protect\url{http://atoms.vuse.vanderbilt.edu/}}}
\end{table}