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Proceedings Paper

Two campaigns to compare three turbulence profiling techniques at Las Campanas Observatory
Author(s): Joanna Thomas-Osip; Edison Bustos; Michael Goodwin; Charles Jenkins; Andrew Lambert; Gabriel Prieto; Andrei Tokovinin
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Paper Abstract

In preparation to characterize the Giant Magellan Telescope site and guide the development of its adaptive optics system, two campaigns to systematically compare the turbulence profiles obtained independently with three different instruments were conducted at Las Campanas Observatory in September, 2007 and January 2008. Slope detection and ranging (SLODAR) was used on the 2.5-m duPont telescope. SLODAR measures the C2n profile as a function of altitude through observations of double stars. The separation of the observed double star sets the maximum altitude and height resolution. Ground layer (altitudes < 1 km) and free atmosphere turbulence profiles are compared with those obtained with a lunar scintillometer (LuSci) and a multi-aperture scintillation sensor (MASS), respectively. In addition, the total atmospheric seeing was measured by both SLODAR and a differential image motion monitor (DIMM).

Paper Details

Date Published: 11 July 2008
PDF: 11 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70145I (11 July 2008); doi: 10.1117/12.789957
Show Author Affiliations
Joanna Thomas-Osip, GMT/Las Campanas Observatory (Chile)
Edison Bustos, Cerro Tololo Inter-American Observatory/AURA Inc. (Chile)
Michael Goodwin, Research School of Astronomy and Astrophysics, The Australian National Univ. (Australia)
Charles Jenkins, Research School of Astronomy and Astrophysics, The Australian National Univ. (Australia)
Andrew Lambert, The Univ. of New South Wales@Australian Defence Force Academy (Australia)
Gabriel Prieto, GMT/Las Campanas Observatory (Chile)
Andrei Tokovinin, Cerro Tololo Inter-American Observatory/AURA Inc. (Chile)


Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

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