Quasar Sightline and Galaxy Evolution Survey I

QSAGE is the first grism galaxy survey to focus on the circumgalactic medium at z~1, providing a blind survey of the galaxy population. The galaxy sample is H{alpha} flux limited (f(H{alpha})>2x10^-17^erg/s/cm^2^) at 0.68<z<1.44, corresponding to >~0.2-0.8M_{sun}_/yr.

In this first of 12 fields, we combine the galaxy data with high-resolution STIS and COS spectroscopy of the background quasar to study OVI in the circumgalactic medium. At z~1, we find OVI absorption systems up to b~350kpc (~4R_vir_) from the nearest detected galaxy. Further, we find ~50 per cent of >~1M_{sun}_/yr star-forming galaxies within 2R_vir_ show no associated OVI absorption to a limit of at least N(OVI)=10^13.9^cm^-2^.