Light Pollution At High Zenith Angles, As Measured at Cerro Tololo Inter-American Observatory11Based in part on observations taken at the Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc. (AURA) under cooperative agreement with the National Science Foundation.

Abstract

ABSTRACTOn the basis of measurements of the V-band sky brightness obtained at Cerro Tololo Inter-American Observatory in 2006 December and 2008 December we confirm the functional form of the basic model of Garstang. At high zenith angles we measure an enhancement of a factor of 2 over Garstang’s later model when there is no marine cloud layer over La Serena/Coquimbo. No corresponding enhancement is found in the B band.