XMM Users' Handbook


next up previous contents
Next: EPIC quantum efficiencies Up: EUROPEAN PHOTON IMAGING CAMERA Previous: EPIC imaging - angular

   
Intrinsic energy resolution of EPIC

The CCD pixels of the EPIC cameras are energy sensitive, enabling non-dispersive spectroscopy. The resolving power of these cameras is determined by the intrinsic energy resolution of the individual pixels and not by the PSF of the X-ray telescopes. The spectral resolution of both the EPIC MOS and pn CCDs, as a function of energy, is displayed in Fig. 18.


  
Figure 18: The EPIC pn and MOS energy resolution (FWHM) as a function of energy. The data points come from SciSim simulations.
\begin{figure}
\begin{center}
\leavevmode
\epsfig{width=0.6\hsize, angle=270, file=figs/epic_specres.eps}
\end{center} \end{figure}



European Space Agency - XMM Science Operations Centre