The Quantative Assessment of UV Extinction Derived From IUE Data of Giants and Supergiants
Sembach, Kenneth R.; Cardelli, Jason A.; Mathis, John S.
United States
Abstract
It is shown here that the UV interstellar extinction towards hot luminous stars can be determined as accurately as for hot main-sequence stars. An atlas of IUE dereddened fluxes is presented for 13 lightly reddened stars within the 1160-3125 A range. The fluxes of these stars how absorption line strengths that allow a rather accurate determination of relative temperatures and luminosities which is more suitable for the determination of UV extinction via the pair method than choosing a comparison star based on quoted optical MK classifications.