Table 11: Forbidden lines searched for in 20 symbiotic stars.
$\lambda_{\rm vac}$ (Å) Spectra Config.a Transition Aij (s-1) Nob.
3110.08 [Ar III] 3p4 3P1-1S0 4.02 3
3071.44 [N II] 2p2 3P2-1S0 1.4 $\times$ 10-4 3
3063.72 [N II] 2p2 3P1-1S0 0.032 1
3006.10 [Ar III] 3p4 3P2-1S0 0.043 1
2993.64 [Mg V] 2p4 3P0-1D2 6.7 $\times$ 10-5 2
2975.66 [Ne V] 2p2 1D2-1S0 2.60 2
2973.15 [O I] 2p4 3P1-1S0 0.075 1
2959.23 [O I] 2p4 3P2-1S0 2.4 $\times$ 10-4 1
2928.87 [Mg V] 2p4 3P1-1D2 0.55 8
2868.99 [Ar IV] 3p3 4S3/2-2P1/2 0.97 3
2854.48 [Ar IV] 3p3 4S3/2-2P3/2 2.55 4
2786.82 [Ar V] 3p2 3P2-1S0 0.081 0
2783.50 [Mg V] 2p4 3P2-1D2 1.90 8
2692.02 [Ar V] 3p2 3P1-1S0 6.80 4
2629.92 [Mg VII] 2p2 3P2-1D2 3.39 1
2509.98 [Mg VII] 2p2 3P1-1D2 1.30 1
2471.09 [O II] 2p3 4S3/2-2P3/2 0.052 6
2470.97 [O II] 2p3 4S3/2-2P1/2 0.021 6
2442.12 [Mg VII] 2p2 3P1-1D2 1.3 $\times$ 10-4 0
2425.15 [Ne IV] 2p3 4S3/2-2D5/2 4.1 $\times$ 10-4 3
2422.51 [Ne IV] 2p3 4S3/2-2D3/2 5.3 $\times$ 10-3 4
2418.20 [Mg V] 2p4 1D1-1S0 4.20 2
2332.11 [O III] 2p2 3P2-1S0 6.3 $\times$ 10-4 1
2321.66 [O III] 2p2 3P1-1S0 0.22 5
1814.63 [Ne III] 2p4 3P1-1S0 2.20 3
1806.49 [Mg VI] 2p3 4S3/2-2D5/2 3.2 $\times$ 10-3 2
1805.94 [Mg VI] 2p3 4S3/2-2D3/2 0.12 2
1793.70 [Ne III] 2p4 3P2-1S0 5.1 $\times$ 10-3 0
1601.67 [Ne IV] 3p3 4S3/2-2P1/2 0.53 4
1601.50 [Ne IV] 3p3 4S3/2-2P3/2 1.33 4
1592.27 [Ne V] 2p2 3P2-1S0 6.8 $\times$ 10-3 0
1574.77 [Ne V] 2p2 3P1-1S0 4.20 2
a All forbidden lines in this table have the ground configuration for both upper and lower level.
b The number of symbiotic stars where the lines were observed.

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