**Table 1:** Event excesses $s-\alpha b$ and significances S derived using the template and displacement background models for a number of established TeV $\gamma$ -ray sources. The source region is defined by the cut $\theta <\theta _{\rm cut}$ . s: $\gamma$ -ray-like events; b: background estimate; $\alpha$ : normalisation. Datasets are from the HEGRA CT-System archive; Cas A (212 hours), H1426+428 (42 hours, 1999/2000), 1ES1959+650 (94 hours, 2000/2001), Crab (33 hours).
Source	RA [hr]^a	Dec [deg]^a	$\theta_{\rm cut}$ [deg]	s	b	$\alpha$	$s-\alpha b$	S [ $\sigma$ ]^b
- Template background (full correction: Eq. (3)) -
Cas-A	23.390	58.82	0.12	1364	4649	0.258	165	+4.2
H1426+428	14.476	42.67	0.12	385	954	0.295	104	+5.1
1ES1959+650	20.000	65.15	0.12	571	2236	0.210	101	+4.1
Crab	5.576	22.01	0.12	1756	884	0.282	1507	+48.9
- Displacement background -
Cas-A			0.12	1364	6092	0.197	164	+4.2
H1426+428			0.12	385	997	0.283	103	+5.1
1ES1959+650			0.12	571	2437	0.201	81	+3.2
Crab			0.12	1756	1281	0.226	1466	+48.2

$% latex2html id marker 2410 $\textstyle \parbox{13.cm}{ $^{a}$\space J2000 epoch.\\ $^{b}$\space Statistical significance from Eq. (\ref{eq:signif}).}$$

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