All Figures

$\begin{figure} \par\includegraphics[width=8.4cm,clip]{8327fig1.eps} \end{figure}$ Figure 1: Combined image of the XMM-Newton observation of NGC 2808. The three centered circles shown represent the core, half-mass and tidal radii. The detected sources are plotted with their 90% error circles. We used a spatial binning factor of 80 and the image was smoothed with a Gaussian filter. For this reason the core appears blurry, a zoom is shown in Fig. 2.
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In the text

$\begin{figure} \par\includegraphics{8327fig2_new.eps} \end{figure}$ Figure 2: Top: XMM-Newton observation of NGC 2808. Colours correspond to different energy bands, red: 0.5-1.5 keV, green: 1.5-3 keV, blue: 3-10 keV. The field of view is 30 $^\prime$ across. The binning factor is 40 and the image was smoothed with a Gaussian filter. Bottom: A zoomed combined image of the three detectors is shown on the left and the image on the right shows a reconstruction of the core with eight sources (only five are detected at $4\sigma$ , the other three are detected at $2.5\sigma$ ). The core and the half-mass radii are shown.
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In the text

$\begin{figure} \par\includegraphics[height=8.4cm,clip]{8327fig3.eps} \end{figure}$ Figure 3: Contour map of the XMM-Newton MOS2 observation of NGC 4372. Core and half-mass radii are shown. The detected sources are plotted with their 90% error circles and with contours at 3, 5 and $10\sigma$ . Small circles are XMM-Newton sources and bigger dashed circles are ROSAT sources with their error circle as reported by Johnston et al. (1996).
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In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{8327fig4.ps} \end{figure}$ Figure 4: ${\rm Log}~(N){-}\log~(S)$ diagram in the band 0.5-2 keV. S is the limiting flux and N the number of sources. The empirical relation of Hasinger et al. (2005) is reported for comparison.
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In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{8327fig5.ps} \end{figure}$ Figure 5: Flux-colour diagram of NGC 2808 sources. For clarity, only the 30 brightest sources are enumerated, the flux values for all the sources are listed in Table 2. R is the count rate for the given energy band in keV. A typical error bar is shown at the bottom right. Black lines represent the following models, assuming an absorption of $1.2\times10^{21}{\rm ~cm^{-2}}$ : NSA: neutron star with hydrogen atmosphere, mass $1.4~{M_{\odot}}$ , radius 12 km, distance of the cluster and $\log~(T_{\rm eff})=5.9$ , 6, 6.1, 6.2. NSA PO: NSA and a power law with photon index of 1 and contribuing 50% of the flux.
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In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{8327fig6.ps} \end{figure}$ Figure 6: Colour-colour diagram of NGC 2808 sources. Same comments as for Fig. 5. PO: power law with photon indices 3, 2.5, 2, 1.5, 1, 0.5. BR: thermal bremsstrahlung with temperatures 1, 5, 10, 15, 20, 50 keV. BB: blackbody spectrum with temperatures 0.1, 0.5, 1, 1.5, 2 keV. NSA: neutron star with hydrogen atmosphere, mass $1.4~{M_{\odot}}$ , radius 12 km, distance of the cluster and $\log~(T_{\rm eff})=5$ , 6, 6.5, 6.8, 7.
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In the text

$\begin{figure} \par\includegraphics[width=8.5cm,clip]{8327fig7.ps} \end{figure}$ Figure 7: Spectrum of C1 (NGC 2808) fitted with a power law model and the absorption of the cluster.
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In the text

$\begin{figure} \par\includegraphics[width=8.5cm,clip]{8327fig8.ps} \end{figure}$ Figure 8: Spectrum of C2 (NGC 2808) fitted with a NSA model and the absorption of the cluster. The contribution of C1 also appears as a power law.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{8327fig9.ps} \end{figure}$ Figure 9: Lightcurve of source 1 (NGC 2808) and corresponding good time intervals (GTI) as defined in Sect. 2.1. Start time t₀ is February 1st 2005 4:57:28 (MJD 2 453 402.70657).
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{8327figa.eps} \end{figure}$ Figure 10: Flux-colour diagram of NGC 4372 sources detected with XMM-Newton (crosses, units on the left axis) and ROSAT (diamonds, units on the right axis). R is the count rate for the given energy band in keV. Typical error bars are shown at the bottom left.
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In the text

$\begin{figure} \par\includegraphics[width=8.4cm,clip]{8327fig1.eps} \end{figure}$	Figure 1: Combined image of the XMM-Newton observation of NGC 2808. The three centered circles shown represent the core, half-mass and tidal radii. The detected sources are plotted with their 90% error circles. We used a spatial binning factor of 80 and the image was smoothed with a Gaussian filter. For this reason the core appears blurry, a zoom is shown in Fig. 2.
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$\begin{figure} \par\includegraphics[height=8.4cm,clip]{8327fig3.eps} \end{figure}$	Figure 3: Contour map of the XMM-Newton MOS2 observation of NGC 4372. Core and half-mass radii are shown. The detected sources are plotted with their 90% error circles and with contours at 3, 5 and $10\sigma$ . Small circles are XMM-Newton sources and bigger dashed circles are ROSAT sources with their error circle as reported by Johnston et al. (1996).
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$\begin{figure} \par\includegraphics[width=8.2cm,clip]{8327fig4.ps} \end{figure}$	Figure 4: ${\rm Log}~(N){-}\log~(S)$ diagram in the band 0.5-2 keV. S is the limiting flux and N the number of sources. The empirical relation of Hasinger et al. (2005) is reported for comparison.
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$\begin{figure} \par\includegraphics[width=8.5cm,clip]{8327fig7.ps} \end{figure}$	Figure 7: Spectrum of C1 (NGC 2808) fitted with a power law model and the absorption of the cluster.
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$\begin{figure} \par\includegraphics[width=8.5cm,clip]{8327fig8.ps} \end{figure}$	Figure 8: Spectrum of C2 (NGC 2808) fitted with a NSA model and the absorption of the cluster. The contribution of C1 also appears as a power law.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{8327fig9.ps} \end{figure}$	Figure 9: Lightcurve of source 1 (NGC 2808) and corresponding good time intervals (GTI) as defined in Sect. 2.1. Start time t₀ is February 1st 2005 4:57:28 (MJD 2 453 402.70657).
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$\begin{figure} \par\includegraphics[width=8cm,clip]{8327figa.eps} \end{figure}$	Figure 10: Flux-colour diagram of NGC 4372 sources detected with XMM-Newton (crosses, units on the left axis) and ROSAT (diamonds, units on the right axis). R is the count rate for the given energy band in keV. Typical error bars are shown at the bottom left.
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