Comparison of synthetic Stokes V (upper panel) and I (lower panel) profiles of Fe I 15 648 Å in a two-component atmosphere. The black curve is the inversion result presented in Fig. 6. The red (blue) profile is caused by only the first (second) component, respectively. The respective magnetic field strengths are B = 1147 G and B = 9 G and the filling factor of the component with the strong magnetic field is α = 0.27. We note that both components produce circular polarization signals of similar amplitudes in spite of the very different magnetic fields. The final continuum intensity (lower panel) is about 1.0 (normalized to the quiet Sun value) in spite of the first component featuring very high temperatures (see red lines in the upper-left panel of Fig. 10).