List of some minor updates since February. For each update, I carefully did one step at a time and checked various plots of the analysis to determine the effect it had, and whether the effect was reasonable (i.e. that I had not introduced any bugs).  No bugs found.

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Minor Updates

• Number of strips per cluster with energy more than 3 sigma above pedestal: changed from 6 of 7 to 5 of 7
  • This was the orininal intent, but the code strict inequality instead of a greater than or equals
  • The looser cut allows more statistics but also allows more background
  • The template fit chi^2/ndf has degrated, and the uncertainty due to the residual has thus risen to compensate.
  • This change is the only change that caused substantial difference.
• The newest set of runs was used.
• The cut on the energy of the SMD u+v clusters over the photon energy was removed
  • This cut actually cut very little anyhow, and so didn't seem worth it any more
  • Changes almost nothing.
• A cut was also introduced (and then removed) to double check that photons centered on bad towers are already cut from the analysis.
  • They were already cut, so no need to cut again
• The Monte Carlo trees were remade with the x1 and x2 values stored.
  • This should have had no effect, and it did not.

Note: most plots that changed in Analysis Note II between the April 1st and April 8th version are due to these changes, most notably the first one listed above.