Table 3: Uniform disk (UD) angular diameters derived by fitting Eq. (4) to the narrow-band data taken in respective filters or altogether. The third column gives the reduced chi-square of the fit (chi-square per degree of freedom), denoted $\chi ^{2}_{{\rm r}}$ .
Filter $\phi$ (UD, mas) $\chi ^{2}_{{\rm r}}$

K203 $20.77 \pm 0.18$ 9.20

K215 $20.91 \pm 0.15$ 8.26

K222 $20.44 \pm 0.16$ 0.40

K239 $21.12 \pm 0.25$ 2.01

all $20.72 \pm 0.16$ 6.14

**Table 3:** Uniform disk (UD) angular diameters derived by fitting Eq. (4) to the narrow-band data taken in respective filters or altogether. The third column gives the reduced chi-square of the fit (chi-square per degree of freedom), denoted $\chi ^{2}_{{\rm r}}$ .
Filter	$\phi$ (UD, mas)	$\chi ^{2}_{{\rm r}}$
K203	$20.77 \pm 0.18$	9.20
K215	$20.91 \pm 0.15$	8.26
K222	$20.44 \pm 0.16$	0.40
K239	$21.12 \pm 0.25$	2.01
all	$20.72 \pm 0.16$	6.14

Source LaTeX | All tables | In the text

	1 Introduction
	2 The interferometric calibration process: The need for well-known calibrators
	3 The observations
	4 Interpretation of the data: Comparison with theoretical atmosphere models
	5 The binary hypothesis
	6 Conclusions and outlook
	References