Table 1: The 15 objects of the sample. The redshifts are taken from NED. The columns "SWP'' and "LWP/R'' give the number of observations in each wavelength range. The column " $\Delta T$ '' gives the monitoring duration in the rest frame (at 1300 Å), while the average luminosity $\overline {L_{1300}}$ in the band 1300-1350 Å is given in the seventh column.
Name Classification z SWP LWP/R $\Delta T$ $\overline {L_{1300}}$ E_B-V

(year) ( $\times 10^{40}$ erg s^-1)

Mrk 335 Seyfert 1 0.0257 26 28 12.66 $622.58 \pm 22.78$ 0.059

Mrk 509 Seyfert 1 0.0343 39 32 15.06 $1571.8 \pm 67.16$ 0.060

Mrk 926 Seyfert 1 0.0475 22 16 14.51 $1182.9 \pm 137.73$ 0.053

Mrk 1095 Seyfert 1 0.0331 35 23 10.82 $908.51 \pm 29.44$ 0.170

NGC 3516 Seyfert 1 0.0088 71 22 16.67 $40.51 \pm 2.44$ 0.054

NGC 3783 Seyfert 1 0.0097 95 84 13.54 $70.01 \pm 2.13$ 0.141

NGC 4151 Seyfert 1 0.0033 153 137 18.09 $26.45 \pm 2.17$ 0.031

NGC 4593 Seyfert 1 0.0083 20 15 8.31 $12.65 \pm 1.22$ 0.034

NGC 5548 Seyfert 1 0.0171 175 148 16.60 $189.70 \pm 5.21$ 0.024

NGC 7469 Seyfert 1 0.0163 65 15 17.79 $202.78 \pm 4.59$ 0.079

3C 120.0 Seyfert 1 0.0330 43 21 15.40 $159.96 \pm 9.47$ 0.160

3C 273 Quasar 0.1583 124 114 15.36 $91782\pm 1610.8$ 0.027

3C 390.3 BLRG 0.0561 99 11 16.37 $292.98 \pm 16.11$ 0.071

Fairall 9 Seyfert 1 0.0461 139 63 15.80 $1981.8 \pm 110.48$ 0.042

ESO 141-55 Seyfert 1 0.0371 26 16 11.33 $1785.1 \pm 101.40$ 0.075

**Table 1:** The 15 objects of the sample. The redshifts are taken from NED. The columns "SWP'' and "LWP/R'' give the number of observations in each wavelength range. The column " $\Delta T$ '' gives the monitoring duration in the rest frame (at 1300 Å), while the average luminosity $\overline {L_{1300}}$ in the band 1300-1350 Å is given in the seventh column.
Name	Classification	z	SWP	LWP/R	$\Delta T$	$\overline {L_{1300}}$	E_B-V
					(year)	( $\times 10^{40}$ erg s^-1)
Mrk 335	Seyfert 1	0.0257	26	28	12.66	$622.58 \pm 22.78$	0.059
Mrk 509	Seyfert 1	0.0343	39	32	15.06	$1571.8 \pm 67.16$	0.060
Mrk 926	Seyfert 1	0.0475	22	16	14.51	$1182.9 \pm 137.73$	0.053
Mrk 1095	Seyfert 1	0.0331	35	23	10.82	$908.51 \pm 29.44$	0.170
NGC 3516	Seyfert 1	0.0088	71	22	16.67	$40.51 \pm 2.44$	0.054
NGC 3783	Seyfert 1	0.0097	95	84	13.54	$70.01 \pm 2.13$	0.141
NGC 4151	Seyfert 1	0.0033	153	137	18.09	$26.45 \pm 2.17$	0.031
NGC 4593	Seyfert 1	0.0083	20	15	8.31	$12.65 \pm 1.22$	0.034
NGC 5548	Seyfert 1	0.0171	175	148	16.60	$189.70 \pm 5.21$	0.024
NGC 7469	Seyfert 1	0.0163	65	15	17.79	$202.78 \pm 4.59$	0.079
3C 120.0	Seyfert 1	0.0330	43	21	15.40	$159.96 \pm 9.47$	0.160
3C 273	Quasar	0.1583	124	114	15.36	$91782\pm 1610.8$	0.027
3C 390.3	BLRG	0.0561	99	11	16.37	$292.98 \pm 16.11$	0.071
Fairall 9	Seyfert 1	0.0461	139	63	15.80	$1981.8 \pm 110.48$	0.042
ESO 141-55	Seyfert 1	0.0371	26	16	11.33	$1785.1 \pm 101.40$	0.075

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