Si K-edge (1.82–1.841 keV) was ignored due to response problems. We divided the metals into several elemental groups (He = C = N, O, Ne, Mg = Al, Si, S = Ar = Ca, Fe = Ni), and fixed the abundance of the He=C=N group to solar. Abundances of other groups were treated as free parameters.

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[cccccccc]{} region & model & $kT$ (keV) & O (solar) & Ne (solar) & Mg (solar) & Si (solar) & Fe (solar)\
0–2’ & 1T$^a$ & 0.642$\pm$0.002 & 0.75$\pm$0.06 & 1.54$\pm$0.12 & 1.50$\pm$0.11 & 1.51$\pm$0.12 & 1.14$\pm$0.07\
0–2’ & 2T$^b$ & 1.56$\pm$0.33, 0.641$\pm$0.002 & 0.79$\pm$0.07 & 1.47$\pm$0.15 & 1.52$\pm$0.11 & 1.54$\pm$0.12 & 1.20$\pm$0.07\
2–4’ & 1T & 0.733$\pm$0.004 & 1.01$\pm$0.13 & 2.14$\pm$0.28 & 2.33$\pm$0.24 & 1.81$\pm$0.19 & 1.41$\pm$0.12\
4–6’ & 1T & 0.792$\pm$0.005 & 0.41$\pm$0.06 & 0.62$\pm$0.11 & 0.86$\pm$0.08 & 0.57$\pm$0.06 & 0.49$\pm$0.03\
6–8’ & 1T & 0.811$\pm$0.006 & 0.41$\pm$0.08 & 0.45$\pm$0.13 & 0.74$\pm$0.10 & 0.50$\pm$0.07 & 0.43$\pm$0.03\
8–10’ & 1T & 0.796$\pm$0.008 & 0.34$\pm$0.10 & 0.60$\pm$0.17 & 0.86$\pm$0.14 & 0.53$\pm$0.11 & 0.43$\pm$0.05\
10–12’ & 1T & 0.774$\pm$0.013 & 0.58$\pm$0.28 & 0.67$\pm$ 0.42 & 1.20$\pm$0.40 & 0.84$\pm$0.39 & 0.68$\pm$0.17\
12–28’ & 1T & 0.746$\pm$0.016 & $<$1.20 & 