Table 4:

References for infrared photometry used in Figs. 4-6.

Original work		Facility	N-S	Sa-Sb
	[m]		spat. resolved?
Beck et al. (2004)	K, L	IRTF	+	-
Duchêne et al. (2005)	K, L	Keck	+	+
Herbst et al. (2007)	, L	VLT	+	+
Ghez et al. (1991)	10.1, 12.5	Hale 5 m	+	-
Ratzka et al. (2009)	12.8	VLTI	+	+
van den Ancker et al. (1999)	12.8	ISO	-	-
this work		VLT	+	+
Ratzka et al. (2009)	12.8	Spitzer	-	-
this work	12.4	UKIRT		-
this work	12.8	ESO 3.6 m		-
this work	12.8	VLT	+	-

Notes. The first three columns give the reference to the original work, the wavelength of observation, and the facility used, respectively. In the last two columns we indicate whether the observations spatially separated the northern and southern component and the Sa-Sb sub-components of T Tau S, respectively.
 Includes also data from WIRO, Keck, and Gemini North. The Sa-Sb pair remained unresolved in most of these observations, ut several spatially resolved data points are included as well. Besides a large number of their own measurements, Beck et al. include literature data from Dyck et al. (1982), Beckwith et al. (1984), Maihara & Kataza (1991), Ghez et al. (1991), Tessier et al. (1994), Kobayashi et al. (1994), Simon et al. (1996), Roddier et al. (2000), Herbst et al. (1997), White & Ghez (2001), Koresko (2000), Kasper et al. (2002), Duchêne et al. (2002), and Furlan et al. (2003).
 We applied scaling factors of  = -0.18 mag and L = +0.32 mag to all components, so that the magnitudes of T Tau N match the mean literature values of K=5.52 and L = 4.32.