**Table 4:** Events passing cuts in on and *off* regions for the Crab, listed by data set along with excesses, significance and $\ensuremath {\gamma }$ -ray rates. Various selection cuts described in Table 2 are also compared for data sets I-III combined. The results using the ring-background model are given (denoted as Ring). The integrated flux from the Crab above 1 TeV is shown also, as described in Sect. 7.1. The $\ensuremath {\chi ^{2}}$ / d.o.f. for a fit to a constant flux for the data set is given, as is the percentage run-by-run rms deviation in the flux.
Data Set	method	on	off	$\alpha$	excess	significance	rate	$\ensuremath{\sigma/\!\sqrt{t~({\rm h}^{-1})}}$	${F}_{>1~{\rm TeV}}$	$\ensuremath {\chi ^{2}}$ / d.o.f.	rms
						$\sigma$	$\ensuremath{\gamma~{\rm min}^{-1}}$		( $\times 10^{-11}~\ensuremath{{\rm cm}^{-2}~{\rm s}^{-1}}$ )		%
I	std	1866	749	0.20	1718	62.2	$5.93 \pm 0.10$	28.3	$1.94 \pm 0.05$	14/10	11.0
II	std	1976	1579	0.20	1667	53.2	$4.85 \pm 0.09$	22.2	$2.37 \pm 0.07$	27/13	16.0
III	std	4759	2417	0.20	4283	94.2	$6.70 \pm 0.07$	28.9	$2.21 \pm 0.04$	53/25	12.1
all	std	8601	4745	0.20	7666	124	$6.0 \pm 0.05$	27.0	$2.16 \pm 0.03$	133/51	14.9
all	loose	27970	61740	0.20	15570	106	$12.2 \pm 0.16$	23.1	$2.08 \pm 0.02$	143/51	22.2
all	hard	3058	376	0.19	2986	94	$2.35 \pm 0.02$	20.5	$2.43 \pm 0.05$	87/51	20.0
all	extended	25490	24160	0.51	13140	80	$10.3 \pm 0.13$	17.4	$2.21 \pm 0.03$	128/51	22.2
all	std Ring	8525	6573	0.14	7588	129	$5.97 \pm 0.05$	28.0	$2.17 \pm 0.03$	133/51	15.0

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