Table 11: Features in the difference spectrum of the 1999 and 2002 LETGS data. We list Gaussian centroids $\lambda$ (in the restframe of NGC 5548), $\sigma$ and peak value p; peaks are expressed as a fraction of the 2002 spectrum at the same energy.
$\lambda$ (Å) $\sigma$ (Å) p

16.10 $\pm$ 0.06 $\rm0.10^{+0.09}_{-0.04}$ -0.25 $\pm$ 0.09

22.36 $\pm$ 0.02 0.03 $\pm$ 0.02 +0.85 $\pm$ 0.29

27.18 $\pm$ 0.07 $\rm0.08^{+0.07}_{-0.05}$ -0.27 $\pm$ 0.12

34.13 $\pm$ 0.08 0.12 $\pm$ 0.07 +0.34 $\pm$ 0.14

**Table 11:** Features in the difference spectrum of the 1999 and 2002 LETGS data. We list Gaussian centroids $\lambda$ (in the restframe of NGC 5548), $\sigma$ and peak value p; peaks are expressed as a fraction of the 2002 spectrum at the same energy.
$\lambda$ (Å)	$\sigma$ (Å)	p
16.10 $\pm$ 0.06	$\rm0.10^{+0.09}_{-0.04}$	-0.25 $\pm$ 0.09
22.36 $\pm$ 0.02	0.03 $\pm$ 0.02	+0.85 $\pm$ 0.29
27.18 $\pm$ 0.07	$\rm0.08^{+0.07}_{-0.05}$	-0.27 $\pm$ 0.12
34.13 $\pm$ 0.08	0.12 $\pm$ 0.07	+0.34 $\pm$ 0.14

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observation and data reduction
	3 Spectral data analysis
	4 Timing analysis
	5 Discussion
	6 Ionization structure
	7 The outflow
	8 Summary and conclusions
	References
	Online Material
	Appendix A
	Appendix B
	Appendix C