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$\begin{figure} \includegraphics[width=9cm]{figure1.eps} \end{figure}$ Figure 1: Definitions of the geometry of a triangle. The $\mbox{$\vec{X}$ }_l$ are the vertices of the triangle, the $\mbox{$\vec{x}$ }_l$ the corresponding sides, $\varphi _l$ are the orientations of the sides relative to the positive x₁-direction, the $\phi _l$ are the interior angles of the triangle. The figure also shows the orthocenter H, i.e. the intersection of the heights of the triangle.
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In the text

$\begin{figure} \par\includegraphics[width=14cm,clip]{0217fig2.ps} \end{figure}$ Figure 2: Contours of the integration function ${\vert{\breve{q_1}}\vert^2~\vert{\breve{q_2}}\vert^2~\vert{\breve{q_3}}\vert^2 \over \Theta^6}~ f_1^{*2}~f_2^{*2}~f_3^{*2}~ {\rm e}^{-Z}$ - see (62) - as a function of y₁ and y₂ for fixed $\psi$ ( upper row: $\psi =\pi /4$ , lower row: $\psi =\pi /2$ ). The left-most of the three columns represents the case where all three aperture radii are equal. The function scales with the aperture radius. Note that the imaginary part vanishes here because of symmetry. The two right columns show the real and imaginary part of the integrand for three different filter radii. The contour lines are logarithmically spaced with a factor of 5 between successive lines, starting with 10^-10. Dashed lines correspond to negative values.
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In the text

$\begin{figure} \resizebox{18cm}{!}{ \includegraphics{0217fig3.ps} \bigskip } \end{figure}$ Figure 3: Contours of the latter part of the integrand in Eq. (71). The plotted function is ${\rm e}^{-Z}$ times the term in square brackets. The upper and lower row correspond to fixed values of $\psi =\pi /4$ and $\pi /2$ respectively. In the left two columns, the real and imaginary part of the function is shown for the three aperture radii being equal. The right two panels correspond to three different radii. The contours are the same as in Fig. 2.
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In the text