All Figures

$\begin{figure} \par\includegraphics[bbllx=113,bblly=209,bburx=498,bbury=586,width=8.0cm, angle=0,clip=true]{H4536F1.ps} \end{figure}$ Figure 1: X-ray image of RBS 380 (z=0.52) in the [0.3-10 keV] band, adaptatively smoothed with the csmooth CIAO tool and cross-check with the IRAF Gauss task. The total area is $14'\times 14'$ . The rotated square shows the region that was observed in the optical band (V and R). The circle with a radius of $1\hbox {$.\mkern -4mu^\prime $ }5$ marks the area within which we have computed a count rate of 0.05 counts/s. Point-like X-ray sources have been removed. North and East are marked.
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In the text

$\begin{figure} \par\includegraphics[bbllx=131,bblly=229,bburx=479,bbury=564,width=6.0cm, angle=0,clip=true]{H4536F2.ps} \end{figure}$ Figure 2: Optical R band image of RBS 380 (z=0.52). The total area is $5'\times 5'$ . North is up and East is left.
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In the text

$\begin{figure} \par\epsfxsize=5.2 cm \rotatebox{-90}{\epsffile{H4536F3upper.ps}} \epsfxsize=5.2 cm \rotatebox{-90}{\epsffile{H4536F3lower.ps}} \end{figure}$ Figure 3: All the objects detected in V (upper panel) and R (lower panel) bands. A vertical stellar locus is present in both plots at the position of the seeing for each image. The magnitudes are not calibrated.
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In the text

$\begin{figure} \par\epsfxsize=5.2 cm \rotatebox{-90}{\epsffile{H4536F4upper.ps}} \epsfxsize=5.2 cm \rotatebox{-90}{\epsffile{H4536F4lower.ps}} \end{figure}$ Figure 4: Galaxies detected in V (upper panel) and R (lower panel) bands. The magnitudes are calibrated using the SSS archive.
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In the text

$\begin{figure} \par\epsfxsize=5.2 cm \rotatebox{-90}{\epsffile{H4536F5.ps}} \end{figure}$ Figure 5: Colour-magnitude diagram for the detected galaxies both in V and R filters. Although the final number of galaxies is low due to the low number of detection in V band, a close relation can be infered at least up to a limit of 23rd magnitude.
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In the text

$\begin{figure} \par\epsfxsize=7.4 cm \rotatebox{0}{\epsffile{H4536F6upper.ps}}\\ \epsfxsize=7.4 cm \rotatebox{0}{\epsffile{H4536F6lower.ps}} \end{figure}$ Figure 6: Upper panel: in the distribution of galaxies for the R filter we see the completeness until the 23rd magnitude, where there is a drop in the number of galaxies detected. Lower panel: the fit shows a red sequence of the detected early-type galaxies with a slope of 0.06.
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In the text

$\begin{figure} \par\epsfxsize=6.5 cm \rotatebox{-90}{\epsffile{H4536F7.ps}} \end{figure}$ Figure 7: Optical R band image of RBS 380 (z=0.52). The total area is $5'\times 5'$ . We have inverted colours and marked the galaxies that were detected as cluster members using both R and V bands with a circle. The arrows indicate the two galaxies used for the calibration from the SSS (see text for details). The thicker arrow shows the AGN described in Sect. 3.1 and in Table 1. North is up and East is left.
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In the text

$\begin{figure} \par\includegraphics[bbllx=119,bblly=220,bburx=491,bbury=575,widt... ...x=443,bbury=458,width=6.5cm, angle=0,clip=true]{H4536F8lower.ps} \end{figure}$ Figure 8: RBS 380 galaxy number density in the R band (upper panel) and the X-rays contours for the same region (lower panel). The circle with radius $1\hbox {$.\mkern -4mu^\prime $ }5$ is the same as in Fig. 1. The total area in both panels is $5'\times 5'$ . North is up and East is left.
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In the text

$\begin{figure} \par\includegraphics[bbllx=131,bblly=229,bburx=479,bbury=564,width=6.0cm, angle=0,clip=true]{H4536F2.ps} \end{figure}$	Figure 2: Optical R band image of RBS 380 (z=0.52). The total area is $5'\times 5'$ . North is up and East is left.
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$\begin{figure} \par\epsfxsize=5.2 cm \rotatebox{-90}{\epsffile{H4536F3upper.ps}} \epsfxsize=5.2 cm \rotatebox{-90}{\epsffile{H4536F3lower.ps}} \end{figure}$	Figure 3: All the objects detected in V (upper panel) and R (lower panel) bands. A vertical stellar locus is present in both plots at the position of the seeing for each image. The magnitudes are not calibrated.
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$\begin{figure} \par\epsfxsize=5.2 cm \rotatebox{-90}{\epsffile{H4536F4upper.ps}} \epsfxsize=5.2 cm \rotatebox{-90}{\epsffile{H4536F4lower.ps}} \end{figure}$	Figure 4: Galaxies detected in V (upper panel) and R (lower panel) bands. The magnitudes are calibrated using the SSS archive.
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$\begin{figure} \par\epsfxsize=5.2 cm \rotatebox{-90}{\epsffile{H4536F5.ps}} \end{figure}$	Figure 5: Colour-magnitude diagram for the detected galaxies both in V and R filters. Although the final number of galaxies is low due to the low number of detection in V band, a close relation can be infered at least up to a limit of 23rd magnitude.
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$\begin{figure} \par\epsfxsize=7.4 cm \rotatebox{0}{\epsffile{H4536F6upper.ps}}\\ \epsfxsize=7.4 cm \rotatebox{0}{\epsffile{H4536F6lower.ps}} \end{figure}$	Figure 6: Upper panel: in the distribution of galaxies for the R filter we see the completeness until the 23rd magnitude, where there is a drop in the number of galaxies detected. Lower panel: the fit shows a red sequence of the detected early-type galaxies with a slope of 0.06.
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$\begin{figure} \par\includegraphics[bbllx=119,bblly=220,bburx=491,bbury=575,widt... ...x=443,bbury=458,width=6.5cm, angle=0,clip=true]{H4536F8lower.ps} \end{figure}$	Figure 8: RBS 380 galaxy number density in the R band (upper panel) and the X-rays contours for the same region (lower panel). The circle with radius $1\hbox {$.\mkern -4mu^\prime $ }5$ is the same as in Fig. 1. The total area in both panels is $5'\times 5'$ . North is up and East is left.
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