Abstract
We intend to carry out the deepest imaging survey ever undertaken of the extended emission line regions protruding from the nuclei of active galaxies and quasars. The aim is to investigate the full extent of these regions, their origin, and ionizing energy sources. The use of occulting masks, now under consideration for OSIRIS, will aid in blocking out the intense emission from the central regions of the galaxies under study, thereby improving the detection limits of the extended, faint, diffuse regions.
