**Table 7:** XMM observations compared with IUE fluxes and ground based photometry.
Filter	$\lambda_{\rm eff}$	Observed flux	IUE flux	mag.
	(Å)	(1 $\times$ 10^-14)	(1 $\times$ 10^-14)
UVM2	2310	0.92	0.80	-
UVW1	2910	0.86	0.92	-
U	3440	0.70	-	14.37
B	4500	0.38	-	15.59
V	5430	0.24	-	15.49

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