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The science community is invited to provide input to the ULLYSES STScI implementation team on target selection.

ULLYSES will serve as define a UV spectroscopic reference sample of young (< 10 Myr) high- and low-mass stars.  The program will obtain up Up to 1,000 orbits of COS and STIS spectroscopy , will be employed in targeting over ~150 OB stars in the Magellanic Clouds and lower metallicity galaxies in the Local Group, and together with ~40 T Tauri stars and brown dwarfs in the Milky Way. In addition, ULLYSES will monitor 4 typical T Tauri stars (~25 observations each, spaced at different rotational phases through at least three rotation periods, and over months-years timescales).

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