2002), is about 0.75 times lower than that predicted by the model. This might indicate that the resonance scattering occurs for the Fe ${\rm_{XV\hspace{-.1em}I\hspace{-.1em}I}}$ ion. The Suzaku intensity ratio is about 1.4 times higher than that from the RGS. This might be because the RGS photons are accumulated from a smaller central region than the XIS where the resonance scattering is more effective. Doron and Behar (2002) indicated the problem of modeling the Fe+16/Fe+17 ion lines, but their recalculation showed that the line intensity ratio of the 0.825 keV line to the sum of the 0.737 and 0.728 keV lines changes by 30–40%, mostly independent of the temperature in the range of 0.6–0.9 keV. Their paper does not refer to the APEC model, and thus this factor of change is not necessarily accepted for our cases. Our results show that the discrepancy of the line intensity ratio between the data and the model is seen only at the central region. Therefore, we conclude that the resonance scattering is robust.

[cc]{}

[cccccccc]{} Ion & &\
& $E$ (keV) & \*flux & \*sum of flux & intensity ratio & $E$ (keV) & \*flux & intensity ratio\
N ${\rm_{V\hspace{-.1em}I}}$ & 0.418-0.428 & 0.43 