2005ApJ...619..357L

In this study, six new interstellar extinction curves in the far-ultraviolet are presented using data from a sounding rocket experiment. The sounding rocket data were combined with IUE data for six lines of sight in the Upper Scorpius group to cover the wavelength range of 912-3030 Å. The extinction curves were produced using the pair comparison method with B stars of similar spectral types. Parameterizations from Fitzpatrick & Massa, Cardelli et al., and Fitzpatrick were then fitted to the derived extinction curves. From the derived extinction curves, their corresponding fits, and the dust model of Weingartner & Draine, it is concluded that the dust population in the Upper Scorpius region exhibits a larger than average grain population with a depletion of smaller grains.