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Fig. B.1


Total and correlated flux spectra for I Zw 1 as well as VISIR photometry and mean photometries: average MIDI total flux spectrum (black, dotted), VISIR spectrum (black solid line), VISIR photometry (black open square), error-weighted means of MIDI total flux and VISIR spectrum (black filled circle). MIDI correlated fluxes are color-coded by baseline with increasing “blueness” indicating longer baselines. For typical error bars of the correlated fluxes, see the radial plots, Fig. 5 and following. The wavelength shown is restframe wavelength. The positions of bright mid-IR spectral lines are indicated by vertical dotted lines; for a list of detected lines, we refer to Sect. 3.3.

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