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Table 1.

Number of nodes used in each inversion cycle.

Parameter Ca II 8542 Å Ca II (+Fe I) Ca II (+Fe I) + IRIS

1 2 1 2 3A 3B
T 4 9 4 9 9 13
vLOS 1 3 1 4 4 4
vmicro 0 2 1 5 5 5
Blon 1 2 1 2 (3) (a) 2 (3) (a) 2
Bhor 1 2 1 2 2 2
α 1 1 1 1 1 1

Notes. The first two sets of columns specify the nodes for the two inversion cycles considering only SST spectral diagnostics, while the last two provide the details for the third cycle that includes IRIS diagnostics, differentiating between the run adding only Mg II (3A) and the one including both Mg II and Si IV (3B) on top of all other diagnostics.

(a)

The number of nodes for Blon in cycles 2 and 3 depends on whether Fe I is included or not; three nodes are used when it is and the Blon and Bhor nodes are in that case placed at log τ500 = [ − 0.5, −2.0, −5.0] and log τ500 = [ − 0.5, −5.0], respectively.

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