Fig. 3

Intensity response functions to temperature for a 8542 Ca line in FALC model atmosphere, normalized with respect to the emergent profile, given in units of 10-4. Top left: emergent line profile; top right: numerical (finite difference) computation of intensity responses; bottom left: responses computed analytically using the method explained in the paper; bottom right: absolute differences between analytical and numerical computations normalized to the maximum response (log scale).
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