Table 2: Relevant parameters of the calibrators used for VINCI observations of Altair.
Name 24 Cap $\chi$ Phe 70 Aql $\alpha$ Ind

HD number HD 200914 HD 12524 HD 196321 HD 196171

$m_{\rm V}$
4.5 5.2 4.9 3.1

$m_{\rm K}$ 0.5 1.3 1.2 0.9

Sp. type M0.5III K5III K5II K0III

$T_{{\rm eff}}$ (K)^a 3630 3780 3780 4720

$\log g ^{{\rm a}}$ 1.4 1.9 1.9 2.6

$[{\rm Fe}/{\rm H}]^{{c}}$ - - - 0.0

$v_{\rm eq} \sin i$ (km s^-1)^d - - 1.9 -

$\oslash_{\rm LD}$ (mas)^a $4.43 \pm 0.05$ $2.77 \pm 0.03$ $3.27 \pm 0.04$ $3.28 \pm 0.03$

$\oslash_{\rm UD}$ (mas)^b $4.30 \pm 0.05$ $2.69 \pm 0.03$ $3.17 \pm 0.04$ $3.20 \pm 0.03$

^a
From Cohen et al. (1999).
^b
Limb-darkened disc diameters $\oslash_{\rm LD}$ converted to uniform disc diameters $\oslash_{\rm UD}$ using the linear
limb-darkening coefficients from Claret (2000a).
^c
From Cayrel de Strobel et al. (1997, 2001).
^d
From Glebocki et al. (2000).

**Table 2:** Relevant parameters of the calibrators used for VINCI observations of Altair.
Name	24 Cap	$\chi$ Phe	70 Aql	$\alpha$ Ind
HD number	HD 200914	HD 12524	HD 196321	HD 196171
$m_{\rm V}$	4.5	5.2	4.9	3.1
$m_{\rm K}$	0.5	1.3	1.2	0.9
Sp. type	M0.5III	K5III	K5II	K0III
$T_{{\rm eff}}$ (K)^a	3630	3780	3780	4720
$\log g ^{{\rm a}}$	1.4	1.9	1.9	2.6
$[{\rm Fe}/{\rm H}]^{{c}}$	-	-	-	0.0
$v_{\rm eq} \sin i$ (km s^-1)^d	-	-	1.9	-
$\oslash_{\rm LD}$ (mas)^a	$4.43 \pm 0.05$	$2.77 \pm 0.03$	$3.27 \pm 0.04$	$3.28 \pm 0.03$
$\oslash_{\rm UD}$ (mas)^b	$4.30 \pm 0.05$	$2.69 \pm 0.03$	$3.17 \pm 0.04$	$3.20 \pm 0.03$

Source LaTeX | All tables | In the text

	1 Introduction
	2 Interferometric observations
	3 Modeling Altair
	4 Results from the $\chi ^2$ analysis
	5 Discussion
	6 Summary and conclusions
	References