DETERMINATION OF THE TEMPERATURES OF SELECTED ISO FLUX CALIBRATION STARS USING THE INFRARED FLUX METHOD

Effective temperatures for 420 stars with spec tral types between A0 a nd K3, and luminosity classes between II and V, selected for a flux ca libration of the Infrared Space Observatory, ISO, have been determined using the Infrared Flux Method (IRFM). The determinations are based o n narrow and wide band photometric data obtained for this purpose, and take into account previously published narrow-band measures of temper ature. Regression coefficients are given for relations between the det ermined temperatures and the photometric parameters (B2-V1), (b-y) and (B-V), corrected for interstellar extinction through use of Hipparcos parallaxes. A correction for the effect of metallicity on the determi nation of integrated flux is proposed. The importance of a knowledge o f metallicity in the representation of derived temperatures for Class V, IV and III stars by empirical functions is discussed and formulae g iven. An estimate is given for the probable error of each temperature determination.