OMEGA stands for OSIRIS Mapping of Emission-line Galaxies in the multi-cluster system A901/2 at z=0.165. It is an ESO Large Programme of 90h and is completed as of February 2014. We have targeted Hα and [NII] with the OSIRIS instrument in the tuneable filter mode at the Gran Telescopio Canarias. We are undertaking a systematic study of AGN and star-forming galaxies across the great range of environments encompassed by A901/2. The videos below illustrate the typical quality of our data.

Video 1

Video 2