SIMBAD references

2019RAA....19...74V - Research in Astron. and astroph., 19, 74-74 (2019/May-0)

Measurements of atmospheric turbulence parameters at Vainu Bappu Observatory using short-exposure CCD images.

VALLAPUREDDY S., BANYAL R.K., RENGASWAMY S. and SELVARAJ A.

Abstract (from CDS):

We report atmospheric turbulence parameters, namely atmospheric seeing, tilt-anisoplanatic angle (θ0) and coherence time (τ0), measured under various sky conditions, at Vainu Bappu Observatory in Kavalur. Bursts of short exposure images of selected stars were recorded with a high-speed, frame-transfer CCD mounted on the Cassegrain focus of a newly commissioned 1.3 m telescope. The estimated median seeing is ≃ 1.85'' at wavelength of ∼ 600 nm, the image motion correlation between different pairs of stars is ∼ 44% for θ0 ≃ 36'' and mean τ0 is ≃ 2.4 ms. This work was motivated by the design considerations and expected performance of an adaptive optics system that is currently being planned for the telescope.

Abstract Copyright:

Journal keyword(s): atmospheric effects - turbulence - instrumentation: adaptive optics - catalogs - methods: observational

Simbad objects: 40

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2021.05.06-13:46:03

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