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For each event, a set of Xtals returns a reconstructed energy. A simple check of the CAL-LO trigger is to look for the highest reconstructed energy which should probably never be below the CAL-LO trigger threshold.
Analyzing 30000 483931 events, of which 12635 213564 had the CAL-LO bit set, the histogram of highest energies shows a peak around 100 MeV with however a significant amount of events below that value.
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