Table 1: Summary of HESS observations of RX J1713.7-3946 conducted during three years. For each year, the targeted position is given together with the wobble offsets in Right Ascension and Declination . Adding the wobble offsets to the target coordinates, the actual pointing position is obtained. For each pointing position, the dead-time corrected observation time (Live time) is given in hours. Data recorded under bad weather conditions are excluded. The columns Data set I-III summarise observation times of data sub-sets used throughout the paper. Data set I is used for Fig. 2; to obtain optimum angular resolution, the 2003 data are disregarded and a zenith-angle cut at is applied (the latter is only relevant for the 2005 data). Data set II is used for spectral comparisons of the different years (cf. Fig. 3). Observations with wobble offsets of in 2004 and 2005 are disregarded for this purpose. Data set III comprises all data, and is used for the generation of the combined spectrum (cf. Fig. 4).

	Target position		Wobble offsets		Live time	Data set I	Data set II	Data set III
Year						best-resolution data	spectral comparisons	all data
					(h)	(h)	(h)	(h)
					9.1
2003	17h12m00s				9.0	0	18.1	18.1
					7.3
					8.1
2004	17h13m33s				6.9	33.1	30.6	33.1
					8.3
					2.5
					9.0
					9.5
2005	17h13m33s				8.7	29.7	36.8	40.1
					9.4
					3.51

1 These observations had wobble offsets of in Right Ascension and Declination,   less than the radius of the SNR, and are summarised in one row.