PKS 2005-489 at VHE: four years of monitoring with HESS and simultaneous multi-wavelength observations

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Table 5:

Best power-law fits to the HESS spectra corrected for EBL absorption following Franceschini et al. (2008).
Epoch	$\Gamma_{\rm int}$ ^a	$\nu F_{\nu} ({\rm 1 TeV})$ ^b	$\chi ^2$ (NDF)
		[10^-12 erg cm^-2 s^-1]
2004	$3.1\pm0.4$	$1.8\pm0.4$	6.4 (7)
2005	$2.6\pm0.2$	$2.7\pm0.4$	13.2 (6)
2006	$2.4\pm0.2$	$2.9\pm0.4$	4.3 (7)
2007	$3.1\pm0.7$	$1.2\pm0.9$	0.5 (2)
2005 7-8^c	$3.2\pm0.4$	$2.4\pm0.6$	9.2 (4)
2005 9^c	$2.5\pm0.3$	$2.9\pm0.5$	4.7 (6)
Total	$2.69\pm0.16$	$2.34\pm0.20$	8.9 (8)

Notes. ^(a) Only the statistical errors are shown. ^(b) The normalization at 1 TeV, in $\nu F_{\nu}$ units. ^(c) The HESS spectrum in 2005, extracted in two different epochs (see Fig. 3): before the XMM pointings (observing periods 2005, 7-8) and during the XMM epoch (period 2005, 9).

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