Four years of optical turbulence monitoring at the Cerro Tololo Inter-American Observatory (CTIO)

Details Four years of optical turbulence monitoring at the Cerro Tololo Inter-American Observatory (CTIO) Four years of optical turbulence monitoring at the Cerro Tololo Inter-American Observatory (CTIO)

2009-06-19

arxiv.org/abs/0906.3665v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

30 pages, 10 figures, accepted for publication in PASP

Scientific paper

The optical turbulence conditions as measured between 2004 until end of 2008 above Cerro Tololo, their seasonal as well as nocturnal behavior are presented. A comparison with the MASS-DIMM system of the Thirty Meter Telescope site testing was conducted and identifies an artificially increased seeing component in the data collected by the CTIO DIMM system under northerly winds. Evidence is shown that this increased turbulence is caused by the telescope dome. A correction for this effect is attempted and applied to the CTIO DIMM data. The MASS data of this comparison campaign allow to set constraints on the general assumption of uniform turbulent layers above a site.

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