Table 2: IOTA calibrator stars information.
Star V H Spectral Adopted UD diameter

Type [mas]

HD 14129 5.5 3.3 G8.5III $1.01 \pm 0.01$ ^a

HD 20791 5.7 3.5 G8.5III $0.89 \pm 0.01$ ^a

HD 28322 6.2 3.9 G9III $0.82 \pm 0.01$ ^a

HD 34137 7.2 4.4 K2III $0.80 \pm 0.01$ ^a

HD 36134 5.8 3.2 K1III $1.16 \pm 0.02$ ^a

HD 50281 6.6 4.3 K3V $0.77 \pm 0.10$ ^b

HD 63838 6.4 3.6 K2III $0.95 \pm 0.01$ ^a

HD 74794 5.7 3.5 K0III $1.07 \pm 0.01$ ^a

^a UD diameter taken from the CHARM2 catalog (Richichi et al. 2005).
^b UD diameter taken from getCal tool (http://mscweb.ipac.caltech.edu/gcWeb/gcWeb.jsp).

**Table 2:** IOTA calibrator stars information.
Star	V	H	Spectral	Adopted UD diameter
			Type	[mas]
HD 14129	5.5	3.3	G8.5III	$1.01 \pm 0.01$ ^a
HD 20791	5.7	3.5	G8.5III	$0.89 \pm 0.01$ ^a
HD 28322	6.2	3.9	G9III	$0.82 \pm 0.01$ ^a
HD 34137	7.2	4.4	K2III	$0.80 \pm 0.01$ ^a
HD 36134	5.8	3.2	K1III	$1.16 \pm 0.02$ ^a
HD 50281	6.6	4.3	K3V	$0.77 \pm 0.10$ ^b
HD 63838	6.4	3.6	K2III	$0.95 \pm 0.01$ ^a
HD 74794	5.7	3.5	K0III	$1.07 \pm 0.01$ ^a

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