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The previous version of this method used events well centered on the CALs and far enough from the edges (the black dot population). The coloured countours are the new areas taken into account now, adding 1 cm to the edges each time. The deposited energy in the CAL as a function of contour is shown below. One sees that the distributions can still be used as density functions (i.e. they peak, but at different values) except for the most outlying contour which is smeared out. For on-axis events with an available track, this seems to be as well as one can do using position cuts.
The purple population has events that lie within the peak zone of the others. Could these be events that actually are within a "good" zone but reconstructed outside of it? The RMS of the reconstructed position is approx 1 cm, the FWHM being close to 4 cm (it looks energy independent from 300 MeV to 10 GeV) hence we are probably limited by the TKR recon close to the edges.
