Table 2 Best-fit parameters of spectral fits

(P/Si)/(P/Si)_⊙

0.9 ± 0.2

0.9 ± 0.2

1.7 ± 0.4

0.8 ± 0.2

(Cl/S)/(Cl/S)_⊙

1.0 ± 0.1

\(0.{7}_{-0.1}^{+0.2}\)

0.9 ± 0.3

0.9 ± 0.1

(K/Ar)/(K/Ar)_⊙

1.3 ± 0.2

1.2 ± 0.2

0.5 ± 0.3

1.1 ± 0.2

(Mg/H)/(Mg/H)_⊙

1.9 ± 0.2

2.5 ± 0.4

1.4 ± 0.3

3.1 ± 0.3

(Al/H)/(Al/H)_⊙

2.1 ± 0.5

\(2.{1}_{-0.7}^{+0.8}\)

<0.7

<0.5

(Si/H)/(Si/H)_⊙

3.67 ± 0.04

4.19 ± 0.09

1.59 ± 0.04

\(3.7{9}_{-0.09}^{+0.05}\)

(P/H)/(P/H)_⊙

\(3.{5}_{-0.6}^{+0.7}\) (5.5σ)

3.6 ± 0.8 (4.7σ)

\(2.{7}_{-0.7}^{+0.6}\)

\(3.{1}_{-0.8}^{+0.7}\)

(S/H)/(S/H)_⊙

\(4.0{4}_{-0.03}^{+0.04}\)

4.23 ± 0.09

\(1.8{5}_{-0.04}^{+0.03}\)

\(4.6{8}_{-0.11}^{+0.09}\)

(Cl/H)/(Cl/H)_⊙

\(4.{2}_{-0.6}^{+0.5}\) (7.7σ)

\(3.{1}_{-0.6}^{+0.7}\) (4.8σ)

\(1.{6}_{-0.5}^{+0.6}\)

\(4.{3}_{-0.6}^{+0.7}\)

(Ar/H)/(Ar/H)_⊙

3.55 ± 0.06

\(3.7{4}_{-0.08}^{+0.09}\)

\(1.8{3}_{-0.06}^{+0.05}\)

\(4.2{2}_{-0.07}^{+0.08}\)

(K/H)/(K/H)_⊙

\(4.{5}_{-0.6}^{+0.7}\) (7.0σ)

\(4.{6}_{-0.7}^{+0.8}\) (6.3σ)

\(0.{9}_{-0.5}^{+0.6}\)

\(4.{8}_{-0.7}^{+0.8}\)

(Ca/H)/(Ca/H)_⊙

3.60 ± 0.07

3.69 ± 0.09

\(2.2{6}_{-0.03}^{+0.07}\)

5.14 ± 0.09

kT_e,1 (keV)

0.92 ± 0.02

0.70 ± 0.03

1.16 ± 0.03

\(0.6{1}_{-0.04}^{+0.01}\)

kT_e,2 (keV)

2.13 ± 0.02

2.18 ± 0.06

\(1.7{8}_{-0.03}^{+0.02}\)

\(1.9{8}_{-0.01}^{+0.03}\)

n_et₁ (10¹⁰ cm⁻³ s)

\(3.1{0}_{-0.09}^{+0.10}\)

4.9 ± 0.4

\(2{8}_{-6}^{+5}\)

\(4.{0}_{-0.3}^{+0.7}\)

n_et₂ (10¹¹ cm⁻³ s)

\(1.8{6}_{-0.03}^{+0.05}\)

1.90 ± 0.07

\(2.{2}_{-0.2}^{+0.1}\)

1.64 ± 0.04

Redshift z₁ (10⁻³)

−3.8 ± 0.1

−3.9 ± 0.2

\(0.5{3}_{-0.06}^{+0.08}\)

−0.34 ± 0.2

Redshift z₂ (10⁻³)

−4.11 ± 0.04

−4.11 ± 0.06

4.3 ± 0.1

\(6.2{0}_{-0.04}^{+0.09}\)

R.m.s. V₁ (km s⁻¹)

1,380 ± 30

1,370 ± 40

\(48{0}_{-20}^{+30}\)

\(\text{1,030}_{-30}^{+40}\)

R.m.s. V₂ (km s⁻¹)

1,340 ± 10

1,340 ± 10

1,830 ± 30

1,920 ± 20

C value/d.o.f.

7,438.28/6777

1,613.18/1248

7,053.81/6,780

7,208.06/6,777