Empirical Verification of the FeiiOscillator Strengths in theFUSEBandpass

We report empirical determinations of atomic oscillator strengths, orf-values, for 11 ground-state transitions of Fe II in the wavelength range 1050to 1150 Ang. We use ultraviolet absorption line observations of interstellarmaterial towards stars in the Galaxy and the Magellanic Clouds taken withCopernicus, the Goddard High Resolution Spectrograph on-board the Hubble SpaceTelescope, and the Far Ultraviolet Spectroscopic Explorer. We derive absoluteoscillator strengths by a combination of the apparent optical depth, componentfitting, and curve-of-growth fitting techniques. Our derived oscillatorstrengths are generally in excellent agreement with recent theoreticalcalculations by Raassen & Uylings using the orthogonal operator technique.However, we identify three of the eleven transitions studied here whosef-values seem to be incompatible with these calculations, by as much as afactor of two. We suggest revisions to these f-values based upon our analysis.