Figure 2. A zoom on figure 1, to show that a cut of 0.1 GeV seems appropriate.
Figure 4. A zoom on Figure 3.
Figure 5. The same kind of plot for preshower 2.
Figure 6. The same kind of plot for the postshower. No obvious Landau distribution is observed.
Figure 8. Hits by eta bin. All eta bins above 4 seem to have enough statistics for calibration.
Figure 10. The width of the Landau distribution for each individual channel by channel number.
Channels with low statistics were set to negative one.
Figure 11. The width of the Landau distribution for each individual channel vs its MPV.
Note that there is no apostrophe in the word "its", as it's used in the possessive.
Here are the text files containing the preshower 1 and 2 Landau MPVs and sigmas.
Preshower 1 Landau text file
Preshower 2 Landau text file