All Figures

$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip]{09772fig01.ps} \end{figure}$ Figure 1: Total-flux (pulsed + DC) spectra of 1708 collected during four one-year intervals of INTEGRAL observations, corresponding to revolution intervals ( from left to right); 037-120, 164-246, 283-366 and 399-485. The upper limits are 2 $\sigma$ . The model lines are single power-law fits (see Table 4).
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip]{09772fig02.ps} \end{figure}$ Figure 2: Error contours ( $1\sigma , 2\sigma$ and $3\sigma$ ) of the power-law model fits to the total spectrum (20-300 keV) for observations 037-120 and 399-485 compared to the total time-averaged fit (037-485). Out of the four observations (each averaged over one year) these two differ most from the four-year time-averaged spectrum.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8cm,clip]{09772fig03.ps} \end{figure}$ Figure 3: Fluxes (20-70 keV) and photon indices for the half-year time sets specified in Table 1 and one shorter observation (see Sect. 3.1.1). Indicated as horizontal dotted lines are the time-averaged values with their 1 $\sigma$ errors (grey bands). Glitches and candidate glitches (Israel et al. 2007; Dib et al. 2008) are indicated as vertical black and grey lines, respectively.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip]{09772fig04.ps} \end{figure}$ Figure 4: High-energy spectra of 1708. In this figure the following is plotted: the unabsorbed total spectra of XMM-Newton (<12 keV) and INTEGRAL (with triangle markers) in black, also in black three COMPTEL upper limits (Kuiper et al. 2006), three INTEGRAL-SPI upper limits in grey (with triangle markers); also in grey a power-law fit to the INTEGRAL-IBIS spectrum, in blue a logparabolic fit to the INTEGRAL-IBIS, SPI and COMPTEL data, total pulsed spectra of XMM-Newton in black, RXTE-PCA and HEXTE are shown in blue and aqua, and the total pulsed spectrum of INTEGRAL-ISGRI in red (with triangle markers).
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In the text

$\begin{figure} \par\includegraphics[width=8.2cm,clip]{09772fig05.ps} \end{figure}$ Figure 5: IBIS-ISGRI pulse profile of 1708 between 20 keV and 270 keV. This profile has a 12.3 $\sigma$ significance using a Z²₃ test (fit shown as a solid curve). The fitted DC level is indicated with an horizontal line. The grey lines and the colours indicate three phase intervals Ph I, II and III (see Table 6). The colours are consistently used in this paper in figures showing results of phase-resolved analyses (see Sect. 3.3.2).
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{09772fig06.ps} \end{figure}$ Figure 6: Pulse profiles from soft to hard X-rays. XMM-Newton pulse profiles in the energy range 0.5-12.0 keV are shown in panels A- D. Panels E- H show INTEGRAL pulse profiles in the energy range 20-270 keV. The differential energy ranges are indicated in the figures. The phase intervals are indicated as in Fig. 5.
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In the text

$\begin{figure} \par\includegraphics[width=8cm,clip]{09772fig07.ps} \end{figure}$ Figure 7: Pulse profiles from RXTE. RXTE-PCA pulse profiles in the energy range 2.2-63.9 keV are shown in panels A- E. RXTE-HEXTE pulse profiles are shown in panels F, G and H within the energy range 14.8-267.6 keV. The phase intervals are indicated as in Fig. 5.
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In the text

$\begin{figure} \par\mbox{\includegraphics[width=3.8cm,clip]{09772fig08a.ps}\hspa... ...}\hspace*{1mm} \includegraphics[width=5.2cm,clip]{09772fig08c.ps} } \end{figure}$ Figure 8: Phase-resolved results for XMM-Newton and RXTE-PCA are presented in the left and center panels, respectively. These data and the INTEGRAL (overlapping) results are shown together in the right panels. Total (except for RXTE), total-pulsed and phase-resolved pulsed spectra are presented in the top panels. The total spectra and total-pulsed spectra are plotted in black. The phase resolved spectra for Ph I, Ph II and Ph III (see Table 6) are plotted in green, blue and magenta, respectively. The XMM-Newton pulsed spectra are also indicated with open circle symbols while the INTEGRAL pulsed spectra are indicated with a triangle symbols. The data points with arrows indicate that the flux values have significances less than 1.5 $\sigma$ and the positive 1 $\sigma$ error is drawn. In the bottom panels $\eta$ - defined as the fraction of the total pulsed emission within a phase interval - is shown in the same colour scheme as the spectra.
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In the text

$\begin{figure} \par\includegraphics[width=7.5cm,clip]{09772fig09.ps} \end{figure}$ Figure 9: The pulsed fractions of 1708 as a function of energy using XMM-Newton below 10 keV and INTEGRAL above 20 keV. The total pulsed fraction is drawn in black and plotted in colour are the pulsed fractions for the three phase intervals (see Table 6).
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In the text

$\begin{figure} \par\includegraphics[width=12cm,clip]{09772fig10.ps} \end{figure}$ Figure 10: Narrow-band phase-resolved spectroscopy of 1708 using RXTE-PCA and INTEGRAL-ISGRI data. Each panel shows the spectrum of a phase interval with $\Delta \phi = 0.1$ . The phase intervals are indicated in the panels. The data points with arrows indicate that the flux values have significances less than 1.5 $\sigma$ . The positive 1 $\sigma$ errors are drawn. Total spectral fits and the three components (when contributing significantly) are drawn in black and grey, respectively (See Sect. 3.3.3 and Fig. 10).
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In the text

$\begin{figure} \par\includegraphics[width=7.7cm,clip]{09772fig11.ps} \end{figure}$ Figure 11: Phase distributions of the normalizations F₀ of the three spectral-model components (see Table 8) taken at pivot energy E₀ = 15.0433 keV for the 10 narrow phase-interval spectra. Indicated with crosses and a thin grey line are the normalizations of the soft power-law component, with triangles and thick grey line the hard power-law component and with squares and a black line the composite spectral component.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip]{09772fig01.ps} \end{figure}$	Figure 1: Total-flux (pulsed + DC) spectra of 1708 collected during four one-year intervals of INTEGRAL observations, corresponding to revolution intervals ( from left to right); 037-120, 164-246, 283-366 and 399-485. The upper limits are 2 $\sigma$ . The model lines are single power-law fits (see Table 4).
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$\begin{figure} \par\includegraphics[angle=-90,width=8.2cm,clip]{09772fig02.ps} \end{figure}$	Figure 2: Error contours ( $1\sigma , 2\sigma$ and $3\sigma$ ) of the power-law model fits to the total spectrum (20-300 keV) for observations 037-120 and 399-485 compared to the total time-averaged fit (037-485). Out of the four observations (each averaged over one year) these two differ most from the four-year time-averaged spectrum.
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$\begin{figure} \par\includegraphics[angle=-90,width=8cm,clip]{09772fig03.ps} \end{figure}$	Figure 3: Fluxes (20-70 keV) and photon indices for the half-year time sets specified in Table 1 and one shorter observation (see Sect. 3.1.1). Indicated as horizontal dotted lines are the time-averaged values with their 1 $\sigma$ errors (grey bands). Glitches and candidate glitches (Israel et al. 2007; Dib et al. 2008) are indicated as vertical black and grey lines, respectively.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{09772fig06.ps} \end{figure}$	Figure 6: Pulse profiles from soft to hard X-rays. XMM-Newton pulse profiles in the energy range 0.5-12.0 keV are shown in panels A- D. Panels E- H show INTEGRAL pulse profiles in the energy range 20-270 keV. The differential energy ranges are indicated in the figures. The phase intervals are indicated as in Fig. 5.
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$\begin{figure} \par\includegraphics[width=8cm,clip]{09772fig07.ps} \end{figure}$	Figure 7: Pulse profiles from RXTE. RXTE-PCA pulse profiles in the energy range 2.2-63.9 keV are shown in panels A- E. RXTE-HEXTE pulse profiles are shown in panels F, G and H within the energy range 14.8-267.6 keV. The phase intervals are indicated as in Fig. 5.
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$\begin{figure} \par\includegraphics[width=7.5cm,clip]{09772fig09.ps} \end{figure}$	Figure 9: The pulsed fractions of 1708 as a function of energy using XMM-Newton below 10 keV and INTEGRAL above 20 keV. The total pulsed fraction is drawn in black and plotted in colour are the pulsed fractions for the three phase intervals (see Table 6).
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