All Figures

$\begin{figure} \par\includegraphics[width=7.1cm,clip]{3712.f1} \end{figure}$ Figure 1: Optical DSS image (grey scale) overlayed with the H I total intensity map of the observed data cube (top) and of the line-of-sight warp model (bottom). Contours are $1 \times 10^{20}$ cm^-2 (pseudo-3 $\sigma$ defined similarly to Verheijen & Sancisi 2001), 4, 7, 10, ... $\times$ 10²⁰ cm^-2. The H I beam is shown in the top left corner.
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In the text

$\begin{figure} \par\includegraphics[width=14.4cm,clip]{3712.f2} \end{figure}$ Figure 2: Selected channel maps; every fourth channel map is displayed. Contours are -4.6, -2.3, 2.3 (2 $\sigma$ ), 4.6, 10, 15, 20, 30, 50 mJy beam^-1. The columns represent the observed data cube, the line-of-sight warp, the flare and the two-component models. Heliocentric radial velocities are shown on right.
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In the text

$\begin{figure} \par\includegraphics[width=7.1cm,clip]{3712.f3} \end{figure}$ Figure 3: Position-velocity diagram along the central major axis of the observed data cube (top) and of the line-of-sight warp model (bottom). Contours are -4.6, -2.3, 2.3 (2 $\sigma$ ), 4.6, 10, 15, 20, 30, 50 mJy beam^-1. The rotation curve computed separately for the two sides is projected onto the top diagram and the adopted rotation curve is projected onto the bottom diagram. The east and west sides are also indicated on the plot.
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In the text

$\begin{figure} \par\includegraphics[width=7.4cm,clip]{3712.f4} \end{figure}$ Figure 4: Illustration of the likely situation of the warp in ESO 123-G23 as seen by the observer.
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In the text

$\begin{figure} \par\includegraphics[width=7.7cm,clip]{3712.f5} \end{figure}$ Figure 5: Parameters adopted for the line-of-sight warp model. From top to bottom, these are: rotation velocity, inclination and position angles, and the angles $\theta$ and $\beta$ (see text).
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In the text

$\begin{figure} \par\includegraphics[width=7.1cm,clip]{3712.f1} \end{figure}$	Figure 1: Optical DSS image (grey scale) overlayed with the H I total intensity map of the observed data cube (top) and of the line-of-sight warp model (bottom). Contours are $1 \times 10^{20}$ cm^-2 (pseudo-3 $\sigma$ defined similarly to Verheijen & Sancisi 2001), 4, 7, 10, ... $\times$ 10²⁰ cm^-2. The H I beam is shown in the top left corner.
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$\begin{figure} \par\includegraphics[width=14.4cm,clip]{3712.f2} \end{figure}$	Figure 2: Selected channel maps; every fourth channel map is displayed. Contours are -4.6, -2.3, 2.3 (2 $\sigma$ ), 4.6, 10, 15, 20, 30, 50 mJy beam^-1. The columns represent the observed data cube, the line-of-sight warp, the flare and the two-component models. Heliocentric radial velocities are shown on right.
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$\begin{figure} \par\includegraphics[width=7.4cm,clip]{3712.f4} \end{figure}$	Figure 4: Illustration of the likely situation of the warp in ESO 123-G23 as seen by the observer.
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$\begin{figure} \par\includegraphics[width=7.7cm,clip]{3712.f5} \end{figure}$	Figure 5: Parameters adopted for the line-of-sight warp model. From top to bottom, these are: rotation velocity, inclination and position angles, and the angles $\theta$ and $\beta$ (see text).
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