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<!-- DOI: 10.1051/0004-6361/200912019 -->

<h2 class="sec">Online Material</h2>

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<tr><td><!-- init Label --><A NAME="fig:ellipse">&#160;</A><!-- end Label--><A NAME="631"></A><A NAME="figure552"
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<td class="img-txt"><span class="bold">Figure 2:</span><p>
Results of isophotal ellipse fitting of the <I>R</I>-band image of UGC&nbsp;628. The position angle and ellipticity of the isophotes are shown on <I> top and bottom panels</I> respectively as a function on the projected radius. The dashed vertical line indicates the projected bar semi-major axis. The shaded area represents the kinematic major axis of the disc at 
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The horizontal line in <I> the bottom panel</I> is the ellipticity of the disc for an inclination of&nbsp;
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<tr><td><!-- init Label --><A NAME="fig:convergence">&#160;</A><!-- end Label--><A NAME="632"></A><A NAME="figure561"
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<td class="img-txt"><span class="bold">Figure 4:</span><p>
Tremaine-Weinberg integrals as a function of the aperture length (or extent of the domain of integration). Filled (respectively, open) symbols and solid (dotted) lines are for the integrals that have (have not) converged to stable values.</p></td>
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