Table 2: Ionic abundances of NGC 6309. In the case of ions with more than one transition, a flux-weighted average was performed. Electron temperature and density values of $T_{\rm e}=$ 10 700 K and $N_{\rm e}=2400$ cm^-3 were used on the calculations.
Ion R1 R2 R3 R4 E2^a W1^a W2^a

He⁺² 0.02 0.03 0.07 0.06 0.06 0.09 -

He⁺ 0.09 0.09 0.05 0.06 - - -

O⁺² ( $\times10^{-4}$ ) 4.68 4.93 2.02 3.78 3.66 3.82 4.41

O⁺ ( $\times10^{-5}$ ) 4.70 5.93 1.28 2.16 - - -

O⁰ ( $\times10^{-5}$ ) 1.13 1.29 0.27 0.25 - - -

Ar⁺⁴ ( $\times10^{-7}$ ) - - 4.26 5.83 - - -

Ar⁺³ ( $\times10^{-7}$ ) 8.78 9.22 12.2 19.4 - - -

Ar⁺² ( $\times10^{-6}$ ) 1.48 1.68 0.90 1.18 1.71 1.91 1.92

N⁺ ( $\times10^{-5}$ ) 1.15 1.37 0.37 0.25 0.18 - -

N⁰ ( $\times10^{-6}$ ) 2.18 - - - - - -

S⁺² ( $\times10^{-6}$ ) - - 2.14 3.99 - - -

S⁺ ( $\times10^{-7}$ ) 5.29 5.87 2.07 1.31 - - -

Ne⁺² ( $\times10^{-4}$ ) 1.59 1.75 - - - - -

Cl⁺² ( $\times10^{-7}$ ) 1.28 1.28 0.63 0.92 - - -

**Table 2:** Ionic abundances of NGC 6309. In the case of ions with more than one transition, a flux-weighted average was performed. Electron temperature and density values of $T_{\rm e}=$ 10 700 K and $N_{\rm e}=2400$ cm^-3 were used on the calculations.
Ion		R1	R2	R3	R4	E2^a	W1^a	W2^a
He⁺²		0.02	0.03	0.07	0.06	0.06	0.09	-
He⁺		0.09	0.09	0.05	0.06	-	-	-
O⁺²	( $\times10^{-4}$ )	4.68	4.93	2.02	3.78	3.66	3.82	4.41
O⁺	( $\times10^{-5}$ )	4.70	5.93	1.28	2.16	-	-	-
O⁰	( $\times10^{-5}$ )	1.13	1.29	0.27	0.25	-	-	-
Ar⁺⁴	( $\times10^{-7}$ )	-	-	4.26	5.83	-	-	-
Ar⁺³	( $\times10^{-7}$ )	8.78	9.22	12.2	19.4	-	-	-
Ar⁺²	( $\times10^{-6}$ )	1.48	1.68	0.90	1.18	1.71	1.91	1.92
N⁺	( $\times10^{-5}$ )	1.15	1.37	0.37	0.25	0.18	-	-
N⁰	( $\times10^{-6}$ )	2.18	-	-	-	-	-	-
S⁺²	( $\times10^{-6}$ )	-	-	2.14	3.99	-	-	-
S⁺	( $\times10^{-7}$ )	5.29	5.87	2.07	1.31	-	-	-
Ne⁺²	( $\times10^{-4}$ )	1.59	1.75	-	-	-	-	-
Cl⁺²	( $\times10^{-7}$ )	1.28	1.28	0.63	0.92	-	-	-

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