The Galaxy Evolution Explorer (GALEX) Surveys of the UV Sky

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The Galaxy Evolution Explorer (GALEX), a NASA Small Explorer UV survey mission, is in its sixth year of science operations. We have completed the Baseline Mission surveys and begun the Extended Mission program. We have continued a popular Guest Investigator (GI) Program. We are delivering our fifth GALEX Data Release (GR5). We have accelerated our data release schedule to once per year. The GALEX Extended Mission has four overarching goals: 1) Extend the UV/SFR calibration to low mass, low metallicity, and transitional galaxies; 2) Relate star formation history to environment, mass, halo mass and assembly history, and star formation regime, and measure star formation history in the low mass universe; 3) Determine the drivers of SF history by linking SF history to halo mass and assembly history, environment, AGN and their evolution, and the Intergalactic medium; 4) Extend the exploration of the UV universe into the dynamic and ultra-low surface brightness UV sky. These objectives are highly complementary to NASA's HST/COS and WFC3 goals, and all three instruments will benefit greatly from contemporaneous operation. The GALEX Primary and Extended Mission surveys will also complement PanSTARRS-1, SDSS-3, Fermi, Herschel, WISE, Warm Spitzer, UKIDSS, and other ground and space-based survey programs.

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