Deep Lens Survey

The Deep Lens Survey (DLS) was a survey of distant galaxies, with the aim of finding gravitational lensing, to assist in determining the universe's mass distribution. It was a photometric-based survey using four bands and covering seven 4-square-degree survey fields. It was carried out between 2001 and 2006 on the Mayall 4m Telescope at Kitt Peak National Observatory (KPNO) and the Víctor M. Blanco Telescope at the Cerro Tololo Inter-American Observatory (CTIO). Though its aim was cosmology, it also discovered minor planets, comets, and supernovae.