Table 5: Number of events before and after cuts for the 1ES 1426+428 data sets. $N_\sigma$ is calculated after correcting for the $\sim$ 80% data acquisition efficiency.
Number of events Significance

Data set Cut $N_{\rm\textit{\scriptsize {\rm On}}}$ $N_{\rm\textit{\scriptsize {\rm Off}}}$ $N_{\rm\scriptsize {On}}-N_{\rm\scriptsize {Off}}$ $N_\sigma$

All data (SPV, $8.8~{\rm h}$ ) Raw data 675 340 673 239 2101

Software trigger 455 794 453 660 2134 2.0

All cuts 64 230 64 433 -203 -0.5

**Table 5:** Number of events before and after cuts for the 1ES 1426+428 data sets. $N_\sigma$ is calculated after correcting for the $\sim$ 80% data acquisition efficiency.
		Number of events	Significance
Data set	Cut	$N_{\rm\textit{\scriptsize {\rm On}}}$	$N_{\rm\textit{\scriptsize {\rm Off}}}$	$N_{\rm\scriptsize {On}}-N_{\rm\scriptsize {Off}}$	$N_\sigma$
All data (SPV, $8.8~{\rm h}$ )	Raw data	675 340	673 239	2101
	Software trigger	455 794	453 660	2134	2.0
	All cuts	64 230	64 433	-203	-0.5

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