Table 2: Maximum variability time scales $\tau _{\rm max}$ of the 1300-1350 Å light curves, corrected for time dilatation. The third column shows the values of $\tau _{\rm max}$ obtained with B=0, i.e. the SFs have been fitted without a slow variability component. The last column presents the corresponding range of event durations $2\mu _{1300}$ , deduced from the simulations.
Object $\tau _{\rm max}$ $\tau_{\max, B=0}$ $2\mu _{1300}$

(year) (year) (year)

Mrk 335 $0.260\pm 0.120$ 0.222 $0.238\pm 0.169$

Mrk 509 $0.550\pm 0.100$ 0.550 $0.489\pm 0.381$

Mrk 926 $0.200\pm 0.120$ 0.227 $\rm0.180^{+0.239} _{-0.120}$

Mrk 1095 $0.400\pm 0.140$ 0.438 $\rm0.242^{+0.371} _{-0.140}$

NGC 3516 $\rm0.046^{+1.009} _{-0.006}$ 4.896 $\rm0.050^{+1.350} _{-0.010}$

NGC 3783 $\rm0.319^{+0.500} _{-0.291}$ 1.229 $\rm0.300^{+1.500} _{-0.280}$

NGC 4151 $\rm0.037^{+1.003} _{-0.007}$ 2.200 $\rm0.040^{+1.500} _{-0.010}$

NGC 4593 $0.284\pm 0.230$ 0.262 $0.686\pm 0.452$

NGC 5548 $0.150\pm 0.030$ 0.154 $0.196\pm 0.063$

NGC 7469 $0.022\pm 0.005$ 0.023 $0.035\pm 0.014$

3C 120.0 $0.234\pm 0.070$ 0.287 $0.321\pm 0.119$

3C 273 $0.452\pm 0.050$ 0.459 $0.559\pm 0.117$

3C 390.3 $0.631\pm 0.070$ 0.635 $0.498\pm 0.240$

Fairall 9 $\rm0.341^{+2.717} _{-0.227}$ 0.760 $\rm0.350^{+2.800} _{-0.250}$

ESO 141-55 $0.997\pm 0.130$ 1.014 $1.630\pm 0.816$

**Table 2:** Maximum variability time scales $\tau _{\rm max}$ of the 1300-1350 Å light curves, corrected for time dilatation. The third column shows the values of $\tau _{\rm max}$ obtained with B=0, i.e. the SFs have been fitted without a slow variability component. The last column presents the corresponding range of event durations $2\mu _{1300}$ , deduced from the simulations.
Object	$\tau _{\rm max}$	$\tau_{\max, B=0}$	$2\mu _{1300}$
	(year)	(year)	(year)
Mrk 335	$0.260\pm 0.120$	0.222	$0.238\pm 0.169$
Mrk 509	$0.550\pm 0.100$	0.550	$0.489\pm 0.381$
Mrk 926	$0.200\pm 0.120$	0.227	$\rm0.180^{+0.239} _{-0.120}$
Mrk 1095	$0.400\pm 0.140$	0.438	$\rm0.242^{+0.371} _{-0.140}$
NGC 3516	$\rm0.046^{+1.009} _{-0.006}$	4.896	$\rm0.050^{+1.350} _{-0.010}$
NGC 3783	$\rm0.319^{+0.500} _{-0.291}$	1.229	$\rm0.300^{+1.500} _{-0.280}$
NGC 4151	$\rm0.037^{+1.003} _{-0.007}$	2.200	$\rm0.040^{+1.500} _{-0.010}$
NGC 4593	$0.284\pm 0.230$	0.262	$0.686\pm 0.452$
NGC 5548	$0.150\pm 0.030$	0.154	$0.196\pm 0.063$
NGC 7469	$0.022\pm 0.005$	0.023	$0.035\pm 0.014$
3C 120.0	$0.234\pm 0.070$	0.287	$0.321\pm 0.119$
3C 273	$0.452\pm 0.050$	0.459	$0.559\pm 0.117$
3C 390.3	$0.631\pm 0.070$	0.635	$0.498\pm 0.240$
Fairall 9	$\rm0.341^{+2.717} _{-0.227}$	0.760	$\rm0.350^{+2.800} _{-0.250}$
ESO 141-55	$0.997\pm 0.130$	1.014	$1.630\pm 0.816$

Source LaTeX | All tables | In the text

	1 Introduction
	2 The concept of discrete-event model
	3 The IUE light curves
	4 Temporal analysis
	5 Interpretation in terms of discrete-event model
	6 Discussion
	7 Conclusion
	References
	Online Material
	Appendix A: Structure functions 1300-3000 Å