Rewrote section 3.2

Updated section 3.2, using an example from X-ray.

VOHE-Note.tex

@@ -450,7 +450,7 @@ \subsubsection{Event selection}
 
 \subsubsection{Event binning}
 
-Binning together events in any of the spatial/spectral/temporal axes is commonly used when analyzing HE astrophysics data to increase the number of counts per bin (at the expense of reduced resolution along the given axis).  For example, binning spatially can increase the S/N of faint extended emission.  For the spectral and temporal axes, binning to achieve a minimum number of counts per bin may be used  to enable data modeling while still preserving the highest possible resolution in regions with more counts.  After binning, this means that  spectra and light curves with variable bin widths may be commonly encountered when dealing with HE datasets.
+Binning together events in any of the spatial/spectral/temporal axes is commonly used when analyzing HE astrophysics data to increase the number of counts per bin (at the expense of reduced resolution along the given axis).  For example, binning spatially can increase the S/N of faint extended emission.  For the spectral and temporal axes, binning to achieve a minimum number of counts per bin may be used  to facilitate data modeling while still preserving the highest possible resolution in regions with more counts.  After binning, this means that  spectra and light curves with variable bin widths may be commonly encountered when dealing with HE datasets.
 
 \subsubsection{The unfolding problem}