$\begin{figure} \par\includegraphics[width=7.6cm,clip]{6939_f07.eps}\end{figure}$ Figure 7: Spectrum of the lens in Q 0142-100. The total integration time is 5600 s. The template spectrum of a redshifted elliptical galaxy is shown for comparison (Kinney et al. 1996). Atmospheric absorptions are indicated in all figures by the label atm.
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In the text

$\begin{figure} \par\includegraphics[width=7.6cm,clip]{6939_f11.eps}\end{figure}$ Figure 11: Spectrum of the lens in BRI 0952-0115. The total integration time is 8400 s. The emission feature marked by the black triangle is residual light of the quasar images. The Ly $\alpha$ emission of the quasar falls exactly at this wavelength.
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In the text

$\begin{figure} \par\includegraphics[width=7.6cm,clip]{6939_f13.eps}\end{figure}$ Figure 13: Spectrum of the images of quasar Q 1355-2257. The total integration time is 8400 s. In the inlet, we show the Mg II absorption lines present in the spectrum of component B and which is due to the lensing galaxy.
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In the text

$\begin{figure} \par\includegraphics[width=6cm,clip]{6939_f01.eps}\end{figure}$	Figure 1: Q 0142-100. Slit width: 1.0 $^{\prime \prime }$ . Mask PA: $+75^{\circ }$ .
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$\begin{figure} \par\includegraphics[width=6cm,clip]{6939_f02.eps}\end{figure}$	Figure 2: SDSS J0246-0825. Slit width: 1.0 $^{\prime \prime }$ . Mask PA: $+55^{\circ }$ .
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$\begin{figure} \par\includegraphics[width=6cm,clip]{6939_f03.eps}\end{figure}$	Figure 3: SDSS J0806+2006. Slit width: 1.0 $^{\prime \prime }$ . Mask PA: $-56^{\circ }$ .
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$\begin{figure} \par\includegraphics[width=6cm,clip]{6939_f04.eps}\end{figure}$	Figure 4: FBQ 0951+2635. Slit width: 1.0 $^{\prime \prime }$ . Mask PA: $+53^{\circ }$ .
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$\begin{figure} \par\includegraphics[width=6cm,clip]{6939_f05.eps}\end{figure}$	Figure 5: BRI 0952-0115. Slit width: 1.0 $^{\prime \prime }$ . Mask PA: $-45^{\circ }$ .
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$\begin{figure} \par\includegraphics[width=6cm,clip]{6939_f06.eps}\end{figure}$	Figure 6: HE 2149-2745. Slit width: 1.0 $^{\prime \prime }$ . Mask PA: $-32^{\circ }$ .
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$\begin{figure} \par\includegraphics[width=7.6cm,clip]{6939_f07.eps}\end{figure}$	Figure 7: Spectrum of the lens in Q 0142-100. The total integration time is 5600 s. The template spectrum of a redshifted elliptical galaxy is shown for comparison (Kinney et al. 1996). Atmospheric absorptions are indicated in all figures by the label `atm`.
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$\begin{figure} \par\includegraphics[width=7.6cm,clip]{6939_f08.eps}\end{figure}$	Figure 8: Spectrum of the lens in SDSS J0246-0825. The total integration time is 8400 s.
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$\begin{figure} \par\includegraphics[width=7.6cm,clip]{6939_f09.eps} \end{figure}$	Figure 9: Spectrum of the lens in SDSS J0806+2006. The total integration time is 5600 s.
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$\begin{figure} \par\includegraphics[width=7.6cm,clip]{6939_f10.eps}\end{figure}$	Figure 10: Spectrum of the lens in FBQ 0951+2635. The total integration time is 5600 s.
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$\begin{figure} \par\includegraphics[width=7.6cm,clip]{6939_f11.eps}\end{figure}$	Figure 11: Spectrum of the lens in BRI 0952-0115. The total integration time is 8400 s. The emission feature marked by the black triangle is residual light of the quasar images. The Ly $\alpha$ emission of the quasar falls exactly at this wavelength.
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$\begin{figure} \par\includegraphics[width=7.6cm,clip]{6939_f12.eps}\end{figure}$	Figure 12: Spectrum of the lens in HE 2149-2745. The total integration time is 8400 s.
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$\begin{figure} \par\includegraphics[width=7.6cm,clip]{6939_f13.eps}\end{figure}$	Figure 13: Spectrum of the images of quasar Q 1355-2257. The total integration time is 8400 s. In the inlet, we show the Mg II absorption lines present in the spectrum of component B and which is due to the lensing galaxy.
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