Table 1: Line flux measurements for TW Hya.
  $\lambda$ [Å] Counts $A_{\rm eff}^{\rm [cm^2]}$ Ion Transm.a Fluxb
3C 15.01 $35.5~\pm~6.2$ 16.0 Fe  XVII 0.859 $7.15~\pm~1.26$
3D 15.26 $32.3~\pm~6.0$ 23.2 Fe  XVII 0.853 $4.45~\pm~0.83$
[c]16.00 blend in O  VIII Fe  XVIII 0.835 $[1.15~\pm~0.41]^{c}$
[c]16.07 $9.39~\pm~3.4$ 19.0 Fe  XVIII 0.834 $1.53~\pm~0.55$
3F 16.78 $16.6~\pm~4.4$ 16.1 Fe  XVII 0.816 $3.13~\pm~0.83$
3G 17.05 $37.6~\pm~6.4$ 14.8 Fe  XVII 0.809 $7.64~\pm~1.30$
M2 17.10 $21.2~\pm~4.8$ 14.6 Fe  XVII 0.807 $4.36~\pm~1.00$
  10.23 $45.0~\pm~7.3$ 83.7 Ne  X - $2.18~\pm~0.35$
  12.13 $200~\pm~14.5$ 43.1 Ne  X - $15.8~\pm~1.15$
  16.00 $47.3~\pm~7.1$ 19.2 VIII - $6.39~\pm~0.97$
  18.97 $121~\pm~11.2$ 8.87 VIII - $29.8~\pm~2.78$
a Transmission efficiencies with $N_{\rm H}=4\times 10^{20}$ cm-2.
b 10-14 erg cm-2 s-1; corrected for $N_{\rm H}$.
$^{c}~{\sim}75$% of 16.07-Å line blends with O  VIII at 16.00 Å.

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