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Prieto G.,GMTO Las Campanas Observatory | Thomas-Osip J.E.,GMTO Las Campanas Observatory | Phillips M.M.,Observatories of Carnegie Institute of Science | McCarthy P.,GMTO | Johns M.,GMTO
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

Cerro Las Campanas located at Las Campanas Observatory in Chile has been selected as the site for the Giant Magellan Telescope. We report results obtained since the commencement, in 2005, of a systematic site testing survey of potential GMT sites at LCO. Seeing data have been obtained at three potential sites, and are compared with identical data taken at the site of the twin Magellan 6.5m telescopes. In addition, measurements of the turbulence profile of the free-atmosphere have been collected. Co. Las Camapanas and the Magellan site are nearly identical in their seeing statistics, and apparently their average ground-layer characteristics. © 2010 SPIE.

Villanueva Jr. S.,Texas A&M University | DePoy D.L.,Texas A&M University | Marshall J.,Texas A&M University | Berdja A.,GMTO Las Campanas Observatory | And 4 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

MooSci is a linear array of photodiodes that measures time varying intensities of light reflected from the Moon, lunar scintillation. The covariance between all possible pairs of photodiodes can be used to reconstruct the ground layer turbulence profile from the ground up to a maximum height roughly determined by the distance between the furthest pair of detectors. This technique of profile restoration will be used for site testing at various locations. This paper describes the design of a lunar scintillometer and preliminary results from Las Campanas Peak. © 2010 Copyright SPIE - The International Society for Optical Engineering.

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