All Figures

$\begin{figure} \par\resizebox{8.8cm}{!}{ \includegraphics{0264fig1.eps}} \end{figure}$ Figure 1: Chandra X-ray spectrum of APM 08279+5255 with two models over-plotted: the Edge model (solid red line) and the 2-Absorption-lines model (solid blue line). In the right panel, we show a closer view of the residuals in the range 1-2 keV. Solid line is the Edge model. Dashed line is the 2-Absorption-lines model.
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In the text

$\begin{figure} \par\rotatebox{-90}{\resizebox{6.4cm}{!}{ \includegraphics{0264fig2.ps}}}\end{figure}$ Figure 2: Instrument convolved ( top), and physical model ( bottom) of Model B applied to the XMM- Newton data ( left) and Chandra data ( right).
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In the text

$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{0264fig3.ps}}\end{figure}$ Figure 3: Residuals (in sign (data-model) $\chi ^2$ ) of our photoionization models A, B, C and D to the XMM- Newton data, in the band (1-2) keV observed frame. Dashed line is the residual of the two-absorbers model. See text.
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In the text

$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{0264fig4.ps}}\end{figure}$ Figure 4: Residuals (in sign (data-model) $\chi ^2$ ) of our photoionization models A,B,C and D to the Chandra data, in the band (1-2) keV observed frame. Dashed line is the residual of the two-absorbers model. See text.
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In the text

$\begin{figure} \par\rotatebox{-90}{\resizebox{6cm}{!}{\includegraphics{0264fig5.ps}}} \end{figure}$ Figure 5: Chandra X-ray spectrum of APM 08279+5255 in the 0.2-10 keV (observed frame) band.The solid thick line is the best-fit two-absorbers model. The inside plot shows the residual (in sign(data-model) $\chi ^2$ ) for the 1-2 keV band. This model gives good agreement on both sets of data.
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In the text

$\begin{figure} \par\rotatebox{-90}{\resizebox{6cm}{!}{\includegraphics{0264fig6.ps}}} \end{figure}$ Figure 6: XMM- Newton X-ray spectrum of APM 08279+5255 in the 0.2-10 keV (observed frame) band.The solid thick line is the best-fit two-absorbers model. The inside plot shows the residual (in sign (data-model) $\chi ^2$ ) for the 1-2 keV band. This model gives goodagreement on both sets of data.
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In the text

$\begin{figure} \par\includegraphics[width=8.8cm,clip]{0264fig7.ps}\end{figure}$ Figure 7: XSTAR ionization balance computation (ionization fraction q_i). Only shown in this plot species of Fe ( XVIII-XXVI). The single-absorber model favors $\log(\xi)\sim 2.1$ , and the absorption feature at $\sim$ 8 keV rest-frame would be identified as the complex Fe C2 in Table 4. However, the HV component of the two-absorbers model strongly suggest that the feature can be associated to the Fe XXV K $_\alpha$ line ( $\log(\xi)\sim 3$ is precisely where Fe⁺²⁴ has its peak).
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In the text

$\begin{figure} \par\resizebox{8.8cm}{!}{ \includegraphics{0264fig1.eps}} \end{figure}$	Figure 1: Chandra X-ray spectrum of APM 08279+5255 with two models over-plotted: the `Edge` model (solid red line) and the `2-Absorption-lines` model (solid blue line). In the right panel, we show a closer view of the residuals in the range 1-2 keV. Solid line is the `Edge` model. Dashed line is the `2-Absorption-lines` model.
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$\begin{figure} \par\rotatebox{-90}{\resizebox{6.4cm}{!}{ \includegraphics{0264fig2.ps}}}\end{figure}$	Figure 2: Instrument convolved ( top), and physical model ( bottom) of Model B applied to the XMM- Newton data ( left) and Chandra data ( right).
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$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{0264fig3.ps}}\end{figure}$	Figure 3: Residuals (in sign (data-model) $\chi ^2$ ) of our photoionization models A, B, C and D to the XMM- Newton data, in the band (1-2) keV observed frame. Dashed line is the residual of the `two-absorbers` model. See text.
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$\begin{figure} \par\resizebox{8.8cm}{!}{\includegraphics{0264fig4.ps}}\end{figure}$	Figure 4: Residuals (in sign (data-model) $\chi ^2$ ) of our photoionization models A,B,C and D to the Chandra data, in the band (1-2) keV observed frame. Dashed line is the residual of the `two-absorbers` model. See text.
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$\begin{figure} \par\rotatebox{-90}{\resizebox{6cm}{!}{\includegraphics{0264fig5.ps}}} \end{figure}$	Figure 5: Chandra X-ray spectrum of APM 08279+5255 in the 0.2-10 keV (observed frame) band.The solid thick line is the best-fit `two-absorbers` model. The inside plot shows the residual (in sign(data-model) $\chi ^2$ ) for the 1-2 keV band. This model gives good agreement on both sets of data.
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$\begin{figure} \par\rotatebox{-90}{\resizebox{6cm}{!}{\includegraphics{0264fig6.ps}}} \end{figure}$	Figure 6: XMM- Newton X-ray spectrum of APM 08279+5255 in the 0.2-10 keV (observed frame) band.The solid thick line is the best-fit `two-absorbers` model. The inside plot shows the residual (in sign (data-model) $\chi ^2$ ) for the 1-2 keV band. This model gives goodagreement on both sets of data.
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