Anatomy of the AGN in NGC 5548 - V. A clear view of the X-ray narrow emission lines

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Table 4

Initial parameters for the O VII triplet from the 770 ks spectrum.


Line^a	Rest λ	Measured λ^b^c	Flow velocity	FWHM	FWHM
	(Å)	(Å)	(km s^-1)	(Å)	(km s^-1)


O VIIr	21.602	21.601 ± 0.004	−20 ± 50	<0.002	<30
O VIIi	21.807	21.772 ± 0.020	−480 ± 160	0.151 ± 0.024	2100 ± 330
O VIIf	22.101	22.077 ± 0.002	−320 ± 40	0.064 ± 0.007	870 ± 100

Notes. C-statistic (21.5−23 Å) = 48 for d.o.f. = 49.

^(a)

r, i and f represent the resonance, intercombination and forbidden lines, respectively;

^(b)

NGC 5548 rest frame values;

^(c)

there is an additional ±0.004 Å error on these values due to RGS absolute wavelength uncertainty.

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