1997A&A...326..736M

We discuss the uncertainties affecting the determinations of effective temperature and apparent angular diameters based on the flux fitting method. We use Kurucz model fluxes and the spectrophotometric scans given in Breger Catalog. In particular, we analyze and discuss the influence of indetermination which may affect the fixed secondary parameters (i.e. surface gravity, overall metallicity, and interstellar reddening correction) on the estimates of the fitted parameters, T_eff and φ. The role of different sources of data for the same star and of each of the above mentioned parameters is described in detail for five representative stars, while 130 non-supergiant solar chemical composition stars, in the spectral range G8 - B0, are used to quantitatively illustrate the statistical behaviour of uncertainties.