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The The Survey for Ionization in Neutral Gas Galaxies (SINGG) was an astronomical survey of 468 galaxies selected from HIPASS, recording H-alpha and R band (the latter for subtraction) to detect and measure the presence of HII regions.
The Survey of Ultraviolet Emission in Neutral-Gas Galaxies (SUNGG) was a followup survey observing selected SINGG galaxies in ultraviolet, using the Galaxy Evolution Explorer (GALEX).