Table 1: Comparing the GQ Lup companion to 2M0535 A and B.

Parameter		 GQ Lup b/Ba 2M0535 A 2M0535 B
$T_{\rm eff}$ [K] $2650 \pm 100$ $2650 \pm 100$b $2790 \pm 105$b
$\log~(L_{\rm bol}/L_{\odot})$ $-2.25 \pm 0.24$ $-1.70 \pm 0.11$ $-1.74 \pm 0.11$
Age [Myr] 0-2 0-3 0-3
Radius [$R_{\odot}$] $\rm0.36^{+0.15}_{-0.11}$ $0.669 \pm 0.034$ $0.511 \pm 0.026$
Mass [$M_{\odot}$] $\rm0.025^{+0.120}_{-0.021}$c $0.054 \pm 0.005$ $0.034 \pm 0.003$
Remarks: a GQ Lup b, if planet or planet candidate; GQ Lup B, if brown dwarf or star. b $\pm 300$ K systematic uncertainty (2006). c Regarding the upper limit: our companion is fainter and smaller than both 2M0535 A and B, hence lower in mass than the components of 2M0535.

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