All Figures

$\begin{figure}\par\includegraphics[ angle=-90,width=7.5cm,clip] {4874fig1.ps} \end{figure}$ Figure 1: Long Term X-ray lightcurve of 3C 454.3 at 1 keV, built using archival data from the Einstein, ROSAT, BeppoSAX, Chandra and Swift satellites.
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In the text

$\begin{figure} \par\includegraphics[angle=0,width=7.7cm,clip]{4874fig2CMJN.eps} \end{figure}$ Figure 2: UVOT light curve of 3C 454.3 in the V (filled circles) and UVW2 (open circles) filters during the observations of April 24 (left side) and May 17 (right side). The time axis is in units of seconds since the beginning of the first UVOT observation (24-April-2005 19:25:27 UT). Similar variability is present in all other UVOT filters. For comparison we also report as filled squares the simultaneous (constant during single exposures) 2-10 keV intensity level.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=7.7cm, clip] {4874fig3.ps} \end{figure}$ Figure 3: BAT light-curve of 3C 454.3 between 25 April and 15 August 2005. The dates of the Swift pointed observations of May 11, 17 and 19 are indicated by the dashed vertical lines.
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In the text

$\begin{figure} \par\includegraphics[ angle=-90,width=12.cm,clip] {4874fig4.ps} \end{figure}$ Figure 4: The observed Spectral Energy Distribution of 3C 454.3. Swift UVOT and XRT data are plotted together with quasi-simultaneous REM data (large, filled circles) and with non-simultaneous multi-frequency data (smaller symbols). BAT spectral results, shown as a bow-tie spectrum, are from the observation of 8 May 2005 when the source intensity was very large. The solid and dashed lines represent the predictions of simple one-zone SSC models that fit the optical and X-ray data reasonably well. Detailed modelling, however, requires a more complex approach that takes into account the different dynamical time-scales at different frequencies. See text for details.
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In the text

$\begin{figure}\par\includegraphics[ angle=-90,width=7.5cm,clip] {4874fig1.ps} \end{figure}$	Figure 1: Long Term X-ray lightcurve of 3C 454.3 at 1 keV, built using archival data from the Einstein, ROSAT, BeppoSAX, Chandra and Swift satellites.
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$\begin{figure} \par\includegraphics[angle=-90,width=7.7cm, clip] {4874fig3.ps} \end{figure}$	Figure 3: BAT light-curve of 3C 454.3 between 25 April and 15 August 2005. The dates of the Swift pointed observations of May 11, 17 and 19 are indicated by the dashed vertical lines.
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