Table 4: Slope $\eta$ of the variability-luminosity relation for the two $C_{\lambda }$ assumptions (see text).
$\gamma$ $\delta$ $\eta$

$C_{\lambda }=0$ $0.96\pm 0.09$ $0.21\pm 0.11$ $-0.13\pm 0.06$

$C_{\lambda }=L_\lambda ^{{\rm min}}$ $1.02\pm 0.11$ $0.21\pm 0.11$ $-0.10\pm 0.05$

**Table 4:** Slope $\eta$ of the variability-luminosity relation for the two $C_{\lambda }$ assumptions (see text).
	$\gamma$	$\delta$	$\eta$
$C_{\lambda }=0$	$0.96\pm 0.09$	$0.21\pm 0.11$	$-0.13\pm 0.06$
$C_{\lambda }=L_\lambda ^{{\rm min}}$	$1.02\pm 0.11$	$0.21\pm 0.11$	$-0.10\pm 0.05$

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