Table 3: Comparison of A-value data sets for Fe  XVIII-Fe  XXIV in terms of mean ratios.

Data sets $^{{\rm a}}$
Fe  XXIV Fe  XXIII Fe  XXII Fe  XXI Fe  XX Fe  XIX Fe  XVIII
$\overline{R}({\rm AST1,AST2})$ $0.95\pm 0.09$ $0.98\pm 0.15$ $1.01\pm 0.15$ $1.00\pm 0.12$ $^{{\rm b}}$ $1.00\pm 0.12$ $1.04\pm 0.08$ 1.00
$\overline{R}({\rm AST2,AST3})$ $1.01\pm 0.08$ $1.00\pm 0.17$ $^{{\rm c}}$ $1.00\pm 0.07$ $0.99\pm 0.11$ $^{{\rm d}}$ $1.00\pm 0.08$ $1.00\pm 0.02$ 1.00
$\overline{R}({\rm HFR3,AST3})$ $0.96\pm 0.13$ $1.00\pm 0.16$ $1.00\pm 0.16$ $1.00\pm 0.17$ $1.01\pm 0.16$ $1.09\pm 0.07$ 1.05
$\overline{R}({\rm HFR4,AST3})$ $1.03\pm 0.13^{{\rm e}}$ $1.06\pm 0.13$ $1.05\pm 0.10$ $ 1.05\pm 0.09$ $ 1.05\pm 0.08$ $ 1.06\pm 0.03$ 1.06
$\overline{R}({\rm COR,AST3}) $ $0.96\pm 0.09$ $1.01\pm 0.17$ $0.95\pm 0.16$ $0.95\pm 0.23$ $^{{\rm f}}$      
$\overline{R}({\rm SAF,AST3}) $ $1.02\pm 0.04$ $1.00\pm 0.23$ $^{{\rm g}}$ $0.96\pm 0.16$$^{\rm h}$ $1.00\pm 0.18$ $^{{\rm i}}$      
$\overline{R}({\rm MCDF,AST3})$ $0.95\pm 0.05$ $1.03\pm 0.17$ $^{{\rm j}}$ $0.96\pm 0.14$ $^{{\rm k}}$ $1.18\pm 0.28$ $^{{\rm l}}$      
$^{{\rm a}}$
Comparison includes only transitions with $\log A_{\rm r}> 13$.
$^{{\rm b}}$
Excludes transitions (6;29,3-4) and (6;26,4).
$^{{\rm c}}$
Excludes transition (4;20,4).
$^{{\rm d}}$
Excludes transitions (6;26,3-4), (6;28,2) and (6;29,4).
$^{{\rm e}}$
Excludes transition (3;19,2).
$^{{\rm f}}$
Excludes transitions (6;23,4), (6;26,4) and (6;29,4).
$^{{\rm g}}$
Excludes transitions (4;25-24,3), (4;20,4) and (4;24,4) in Table 4.
$^{\rm h}$
Excludes transitions (5;43,13), (5;46,15) and (5;49,15) in Table 4.
$^{{\rm i}}$
Excludes transitions (6;26,3-4) and (6;29,4) in Table 4.
$^{{\rm j}}$
Excludes transitions (4;20,4) and (6;38,9) in Table 5.
$^{{\rm k}}$
Excludes transitions (5;k,i) in Table 5.
$^{{\rm l}}$
Excludes transitions (6;k,i) in Table 5.

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