All Figures

$\begin{figure} \par\includegraphics[width=8cm,clip]{H4731F1.ps}\end{figure}$ Figure 1: The central part of the SofI $K_{\rm s}$ -band image. The 3, 5 and 7 $\sigma$ ROSAT X-ray contours are overlaid (Rosati et al. 1998). North is up and East is to the left. The image is 90 $^{\prime \prime }$ on a side, which, for the adopted cosmology, is 0.75 Mpc at z=1.237.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{H4731F2.ps}\end{figure}$ Figure 2: The C-M diagram of objects in the SofI data. The large symbols are objects that are within 20 $^{\prime \prime }$ of the cluster center and the small symbols are objects that are beyond 60 $^{\prime \prime }$ of the cluster center. Objects that have been classified as stellar are plotted with open symbols and non-stellar objects are plotted with solid symbols. No classification is made for objects fainter than $K_{\rm s}=20$ . The solid line is a fit to the C-M relation that was determined from the ISAAC data.
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In the text

$\begin{figure} \vspace*{-1.55cm} \par\setlength{\unitlength}{0.33203mm} \begin{... ...bf { E}} \put(-150,270){Arc?} \put(-160,207){Arc?} \end{picture}\par\end{figure}$ Figure 3: The central part of the ISAAC $K_{\rm s}$ -band image. The image is 75 $^{\prime \prime }$ on a side, which, in the adopted cosmology, corresponds to 0.63 Mpc at z=1.237. The two galaxies near the center of the cluster are 1 $.\!\!^{\prime\prime}$ 8 apart. Spectrally confirmed cluster members and field galaxies (Demarco et al. in preparation) are marked with arrows and circles respectively. Two arc-like features are also marked.
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In the text

$\begin{figure} \par\includegraphics[width=12.5cm,clip]{H4731F4.ps}\end{figure}$ Figure 4: The C-M diagram of objects within 20 $^{\prime \prime }$ of the cluster center. The diagram is generated from the ISAAC data. The solid circles represent objects that have been classified as extended and the stellar symbol represents the object that was classified as a star. Spectrally confirmed cluster members are circled and spectrally confirmed field galaxies are marked with an "X''. The solid red line is a fit to the C-M relation of galaxies within the blue rectangle (see text) and the dotted line is where the E/S0 sequence of the Coma cluster would lie if it were placed at z=1.24 (Rosati et al. 1999). The dot-dashed lines are monolithic collapse models (Kodama & Arimoto 1997). From top to bottom they represent formation redshifts of $z=5,3~ {\rm and }~ 2$ . The error bars that are located near the bottom of the plot indicate the size of the colour and magnitude errors. Also plotted, as open squares, are the spectrally confirmed cluster members that are more than 20 $^{\prime \prime }$ from the cluster center but within the field of view of Fig. 3.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{H4731F1.ps}\end{figure}$	Figure 1: The central part of the SofI $K_{\rm s}$ -band image. The 3, 5 and 7 $\sigma$ ROSAT X-ray contours are overlaid (Rosati et al. 1998). North is up and East is to the left. The image is 90 $^{\prime \prime }$ on a side, which, for the adopted cosmology, is 0.75 Mpc at z=1.237.
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