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$\begin{figure} \par\includegraphics[width=16.8cm,clip]{0212fig1.eps} \end{figure}$ Figure 1: Contour maps of the functions $f(\eta _{\rm u},\theta )$ (left panel) and $g(\eta _{\rm d},\theta )$ (right).
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In the text

$\begin{figure} \par\includegraphics[width=15.8cm,clip]{0212fig2.eps} \end{figure}$ Figure 2: Points in the shaded regions surrounded by dotted and dot-dashed lines satisfy Eqs. (1), (5), (12), and (13) for fixed $\theta$ in the age-limited case. Dotted lines represent Eq. (A.1) with $w_{\rm d}/w_{\rm u}=0.6$ or 40, while dot-dashed lines Eq. (A.4) with $\nu _{\rm rolloff}=1.9\times 10^{17}$ Hz, the region above which is forbidden since $t_{\rm acc}>t_{\rm loss}$ .
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In the text

$\begin{figure} \par\includegraphics[width=16.1cm,clip]{0212fig3.eps} \end{figure}$ Figure 3: Points in the shaded regions surrounded by dotted and dot-dashed lines satisfy Eqs. (1), (5), (17), (18), (19), and $t_{\rm loss}<t_{\rm age}$ for fixed $\theta$ in the energy loss-limited case. Dotted lines represent Eq. (A.14) with $w_{\rm d}/w_{\rm u}=0.6$ or 40, while dot-dashed lines Eq. (A.13) with $\nu _{\rm rolloff}=1.9\times 10^{17}$ or $3.3\times 10^{17}$ Hz.
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In the text

$\begin{figure} \par\includegraphics[width=15.7cm,clip]{0212fig4.eps}\par \end{figure}$ Figure 4: The shaded areas indicate the most likely values of magnetic fields just behind the shock front $B_{\rm d}$ and the maximum energy of shock-accelerated electrons $E_{\rm max}$ . The left panel is for the age-limited case, while the right gives the energy loss-limited model. These areas are formed by the two solid lines for a roll-off energy of $\nu _{\rm rolloff}=(1.9$ -3.3) $\times 10^{17}$ Hz, and the two dashed lines from the observed width of nonthermal X-rays; in the age-limited case, a gyro-radius of accelerated electrons in the downstream should be $r_{\rm g}=E_{\rm max}/({\rm e}B_{\rm d})=(0.065$ -20 $)\times 10^{-2}$ pc, while in the energy loss-limited case, cooling time of accelerated electrons should be $t_{\rm cool}=w_{\rm d}/u_{\rm d}=(0.81$ -5.4 $)\times 10^2$ yrs.
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In the text

$\begin{figure} \par\includegraphics[width=16.8cm,clip]{0212fig1.eps} \end{figure}$	Figure 1: Contour maps of the functions $f(\eta _{\rm u},\theta )$ (left panel) and $g(\eta _{\rm d},\theta )$ (right).
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$\begin{figure} \par\includegraphics[width=15.8cm,clip]{0212fig2.eps} \end{figure}$	Figure 2: Points in the shaded regions surrounded by dotted and dot-dashed lines satisfy Eqs. (1), (5), (12), and (13) for fixed $\theta$ in the age-limited case. Dotted lines represent Eq. (A.1) with $w_{\rm d}/w_{\rm u}=0.6$ or 40, while dot-dashed lines Eq. (A.4) with $\nu _{\rm rolloff}=1.9\times 10^{17}$ Hz, the region above which is forbidden since $t_{\rm acc}>t_{\rm loss}$ .
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$\begin{figure} \par\includegraphics[width=16.1cm,clip]{0212fig3.eps} \end{figure}$	Figure 3: Points in the shaded regions surrounded by dotted and dot-dashed lines satisfy Eqs. (1), (5), (17), (18), (19), and $t_{\rm loss}<t_{\rm age}$ for fixed $\theta$ in the energy loss-limited case. Dotted lines represent Eq. (A.14) with $w_{\rm d}/w_{\rm u}=0.6$ or 40, while dot-dashed lines Eq. (A.13) with $\nu _{\rm rolloff}=1.9\times 10^{17}$ or $3.3\times 10^{17}$ Hz.
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