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Figure 1: The mean deredshifted HET spectrum of Mark 110. The upper panel shows the spectrum. In the lower panel it is scaled to show the weak emission features. The residuals of the best fit are also shown. |
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Figure 2:
The upper panel shows the H |
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Figure 3: The upper panel shows the difference between two spectra of Mark 110 having the same continuum level. The very broad line system (B1) has completely disappeared. The only lines visible belong to the narrower broad line system (B3). The lower panel shows the difference between the mean spectrum of the four strongest spectra and the mean spectrum of the four weakest spectra. |
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Figure 4:
a) Fit of the mean of the four strongest spectra of Mark 110
in the region around He II
|
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Figure 5: Spectra of three NLS1s. Fluxes are in units of 10-15 erg s-1 cm-2 Å-1. As shown in the text, although Mark 110 has narrow "broad'' emission lines, it is probably not a genuine NLS1. |
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