**Table 7:** Summary table showing the various estimated contributions to the systematic flux error.
Uncertainty	Flux	Index
MC Shower interactions	1%
MC Atmospheric sim.	10%
Broken pixels	5%
Live time	1%
Selection cuts	8%	0.08
Background est.	1%	0.01
Run-by-run variability	15%	-
Data set variability	-	0.05
Total	20%	0.09

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