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arxiv: 0905.0741 · v1 · pith:W5SAJHEXnew · submitted 2009-05-06 · 🌌 astro-ph.IM

Measurement of optical turbulence in free atmosphere above Mt.Maidanak in 2005-2007

V. Kornilov (1) , S. Ilyasov (2) , O. Voziakova (1) , Yu. Tillaev (2) , B. Safonov (1) , M. Ibragimov (2) , N. Shatsky (1) , S. Ehgamberdiev (2) ((1) Sternberg astron. inst.
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Moscow Russia (2) Ulughbek astron. inst. Tashkent Uzbekistan)
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keywords abovearcsecatmospherefreemaidanakmeasurementmedianoptical
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Results of 2005-2007 campaign of measurement of the optical turbulence vertical distribution above Mt. Maidanak are presented. Measurements are performed with the MASS (Multi-Aperture Scintillation Sensor) device which is widely used in similar studies during last years at several observatories across the world. The data analysis shows that median seeing in free atmosphere (at altitudes above 0.5km) is 0.46 arcsec and median isoplanatic angle is 2.47 arcsec. Given a rather long atmospheric coherence time (about 7 ms when the seeing is good) such conditions are favorable for adaptive optics and interferometry in the visible and near-IR.

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