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$\begin{figure} \par\includegraphics[width=7.8cm,clip]{6323fg01.ps} \end{figure}$ Figure 1: Contour plot of the J2341 "system'' from the 30 s VLT R-band acquisition image. The contour levels have been chosen to highlight the extended emission. The image shows 18 $^{\prime \prime }$ $\times$ 18 $^{\prime \prime }$ (90 px $\times$ 90 px). The positions and widths of the VLT slit (p.a. 120 $^\circ$ ; 1 $.\!\!^{\prime\prime}$ 3 width) and the NTT slit (p.a. 155 $^\circ$ ; 1 $.\!\!^{\prime\prime}$ 5 width) are indicated by the lightly shaded rectangles. The darker shaded areas indicate the positions and widths of the extraction regions for the spectra used in this paper.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{6323fg02.ps} \end{figure}$ Figure 2: Comparison of the VLT spectrum (dotted line) and the NTT spectrum (solid line; scaled to match the continuum between 4000 and 6000 $\AA$ ).
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In the text

$\begin{figure} \par\includegraphics[width=8cm,angle=0,clip]{6323fg03.ps}\end{figure}$ Figure 3: R-band surface plot and spectra of the two objects obtained with FORS1/VLT. The flux is given in 0^-16 erg s^-1 cm^-2 Å^-1.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{6323fg04.ps}\end{figure}$ Figure 4: Blue portion of the spectra of the quasar and its companion.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{6323fg05.ps} \end{figure}$ Figure 5: Spectra of J2341 and the mean SDSS quasar template of Vanden Berk et al. (2001). The SDSS spectrum was scaled to match J2341 in H $\alpha$ .
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{6323fg06.ps} \end{figure}$ Figure 6: IRS/Spitzer spectra of J2341 and Mrk 231 scaled to match J2341 at 15 $\mu$ m. The positions of important emission lines are marked.
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In the text

$\begin{figure} \includegraphics[width=8.5cm,clip]{6323fg07.ps}\par\includegraphics[width=8.5cm,clip]{6323fg08.ps}\end{figure}$ Figure 7: Comparison of the spectrum of J2341 with the SDSS quasar template moderately reddened E_B-V=0.3 ( top), and strongly reddened E_B-V=0.7 ( bottom).
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In the text

$\begin{figure} \par\includegraphics[width=8.5cm,clip]{6323fg09.ps} \includegraphics[width=8.5cm,clip]{6323fg10.ps} \end{figure}$ Figure 8: The extracted host spectrum without ( top) and with additional reddening of E_B-V=0.3 ontop of the QSO spectrum (dashed line). The host spectra are scaled to remove the Ca II K feature from the QSO after subtraction. Just for these graphs additional offsets were applied to the host spectra to facilitate an easy comparison with the QSO.
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In the text

$\begin{figure} \par\includegraphics[width=8.5cm,clip]{6323fg11.ps} \includegraphics[width=8.5cm,clip]{6323fg12.ps} \end{figure}$ Figure 9: Comparison of the moderately reddened SDSS quasar template with the spectrum of J2341 after subtraction of the host without reddening ( top), and with additional reddening ( bottom).
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{6323fg02.ps} \end{figure}$	Figure 2: Comparison of the VLT spectrum (dotted line) and the NTT spectrum (solid line; scaled to match the continuum between 4000 and 6000 $\AA$ ).
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$\begin{figure} \par\includegraphics[width=8cm,angle=0,clip]{6323fg03.ps}\end{figure}$	Figure 3: R-band surface plot and spectra of the two objects obtained with FORS1/VLT. The flux is given in 0^-16 erg s^-1 cm^-2 Å^-1.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{6323fg04.ps}\end{figure}$	Figure 4: Blue portion of the spectra of the quasar and its companion.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{6323fg05.ps} \end{figure}$	Figure 5: Spectra of J2341 and the mean SDSS quasar template of Vanden Berk et al. (2001). The SDSS spectrum was scaled to match J2341 in H $\alpha$ .
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$\begin{figure} \par\includegraphics[width=8cm,clip]{6323fg06.ps} \end{figure}$	Figure 6: IRS/Spitzer spectra of J2341 and Mrk 231 scaled to match J2341 at 15 $\mu$ m. The positions of important emission lines are marked.
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$\begin{figure} \includegraphics[width=8.5cm,clip]{6323fg07.ps}\par\includegraphics[width=8.5cm,clip]{6323fg08.ps}\end{figure}$	Figure 7: Comparison of the spectrum of J2341 with the SDSS quasar template moderately reddened E_B-V=0.3 ( top), and strongly reddened E_B-V=0.7 ( bottom).
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$\begin{figure} \par\includegraphics[width=8.5cm,clip]{6323fg09.ps} \includegraphics[width=8.5cm,clip]{6323fg10.ps} \end{figure}$	Figure 8: The extracted host spectrum without ( top) and with additional reddening of E_B-V=0.3 ontop of the QSO spectrum (dashed line). The host spectra are scaled to remove the Ca II K feature from the QSO after subtraction. Just for these graphs additional offsets were applied to the host spectra to facilitate an easy comparison with the QSO.
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$\begin{figure} \par\includegraphics[width=8.5cm,clip]{6323fg11.ps} \includegraphics[width=8.5cm,clip]{6323fg12.ps} \end{figure}$	Figure 9: Comparison of the moderately reddened SDSS quasar template with the spectrum of J2341 after subtraction of the host without reddening ( top), and with additional reddening ( bottom).
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