Caldwell, John A RMcIntosh, Daniel HRix, Hans-WalterBarden, MarcoBeckwith, Steven V WBell, Eric FBorch, AndreaHeymans, CatherineHaussler, BorisWisotzki, LutzWolf, Christian2015-12-130067-0049http://hdl.handle.net/1885/71484We describe the data reduction and object cataloging for the GEMS survey, a large-area (800 arcmin2) two-band (F606W and F850LP) imaging survey with the Advanced Camera for Surveys on the Hubble Space Telescope, centered on the Chandra Deep Field-South.Keywords: Galaxies: evolution; Galaxies: structure; Surveys200810.1086/5210802015-12-11