Table 1: The exposure time and the observation details for the Chandra and HST observations of NGC 5548. ACIS stands for the Advanced CCD Imaging Spectrometer and HRC for High Resolution Camera. The E140M grating covers the wavelength range between 1150-1730 Å, the E230M grating between 1607-3119 Å.
Instrument Detector Start date Exposure (ks)

HETGS ACIS-S 2002 Jan. 16 154

LETGS HRC-S 2002 Jan. 18 170

LETGS HRC-S 2002 Jan. 21 170

HST STIS E140M 2002 Jan. 22 7.6

HST STIS E230M 2002 Jan. 22 2.7

HST STIS E140M 2002 Jan. 23 7.6

HST STIS E230M 2002 Jan. 23 2.7

**Table 1:** The exposure time and the observation details for the *Chandra* and HST observations of NGC 5548. ACIS stands for the Advanced CCD Imaging Spectrometer and HRC for High Resolution Camera. The E140M grating covers the wavelength range between 1150-1730 Å, the E230M grating between 1607-3119 Å.
Instrument	Detector	Start date	Exposure (ks)
HETGS	ACIS-S	2002 Jan. 16	154
LETGS	HRC-S	2002 Jan. 18	170
LETGS	HRC-S	2002 Jan. 21	170
HST STIS	E140M	2002 Jan. 22	7.6
HST STIS	E230M	2002 Jan. 22	2.7
HST STIS	E140M	2002 Jan. 23	7.6
HST STIS	E230M	2002 Jan. 23	2.7

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