Abstract

Temporal fluctuations of the atmospheric piston are critical for interferometers as they determine their sensitivity. We characterize an instrumental setup, termed the piston scope, that aims at measuring the atmospheric time constant, τ0, through the image motion in the focal plane of a Fizeau interferometer. High-resolution piston scope measurements have been obtained at the observatory of Paranal, Chile in April 2006. The derived atmospheric parameters are shown to be consistent with data from the astronomical site monitor, provided that the atmospheric turbulence is displaced along a single direction. The piston scope measurements of lower temporal and spatial resolution were recorded for what is believed to be the first time in February 2005 at the Antarctic site of Dome C. Their reanalysis in terms of the new data calibration sharpens the conclusions of a first qualitative examination [Appl. Opt. 45, 5709 (2006)].

© 2007 Optical Society of America

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  1. A. Kellerer and A. Tokovinin, "Atmospheric coherence time in interferometry: definition and measurement," Astron. Astrophys. 461, 775-781 (2007).
    [CrossRef]
  2. A. Kellerer, M. Sarazin, V. Coudé Du Foresto, K. Agabi, E. Aristidi, and T. Sadibekova, "A method of estimating time scales of atmospheric piston and its application at Dome C (Antarctica)," Appl. Opt. 45, 5709-5715 (2006).
    [CrossRef]
  3. J. M. Conan, G. Rousset, and P. Y. Madec, "Wave-front spectra in high-resolution imaging through turbulence," J. Opt. Soc. Am. A 12, 1559-1570 (1995).
  4. T. Butterley, R. Wilson, and M. Sarazin, "Determination of the profile of atmospheric optical turbulence strength from SLODAR data," Mon. Not. R. Astron. Soc. 369, 835-845 (2006).
    [CrossRef]
  5. M. Sarazin and F. Roddier, "The ESO differential image motion monitor," Astron. Astrophys. 227, 294-300 (1990).
  6. M. Sarazin and A. Tokovinin, "The statistics of isoplanatic angle and adaptive optics time constant derived from DIMM data," in Beyond Conventional Adaptive Optics, S. Esposito and R. Ragazzoni, eds., Vol. 58 of ESO Conference and Workshop Proceedings (European Southern Observatory, 2001), pp. 321-328.
  7. European Centre for Medium-Range Weather Forecasts, http://www.ecmwf.int/.
  8. J. Lawrence, M. Ashley, A. Tokovinin, and T. Travouillon, "Exceptional astronomical seeing conditions above Dome C in Antarctica," Nature 431, 278-281 (2004).
    [CrossRef]
  9. A. Tokovinin, National Optical Astronomy Observatory: MASS presentation, http://www.ctio.noao.edu/∼atokovin/profiler/(2006).

2007

A. Kellerer and A. Tokovinin, "Atmospheric coherence time in interferometry: definition and measurement," Astron. Astrophys. 461, 775-781 (2007).
[CrossRef]

2006

T. Butterley, R. Wilson, and M. Sarazin, "Determination of the profile of atmospheric optical turbulence strength from SLODAR data," Mon. Not. R. Astron. Soc. 369, 835-845 (2006).
[CrossRef]

A. Kellerer, M. Sarazin, V. Coudé Du Foresto, K. Agabi, E. Aristidi, and T. Sadibekova, "A method of estimating time scales of atmospheric piston and its application at Dome C (Antarctica)," Appl. Opt. 45, 5709-5715 (2006).
[CrossRef]

2004

J. Lawrence, M. Ashley, A. Tokovinin, and T. Travouillon, "Exceptional astronomical seeing conditions above Dome C in Antarctica," Nature 431, 278-281 (2004).
[CrossRef]

1995

1990

M. Sarazin and F. Roddier, "The ESO differential image motion monitor," Astron. Astrophys. 227, 294-300 (1990).

Appl. Opt.

Astron. Astrophys.

M. Sarazin and F. Roddier, "The ESO differential image motion monitor," Astron. Astrophys. 227, 294-300 (1990).

A. Kellerer and A. Tokovinin, "Atmospheric coherence time in interferometry: definition and measurement," Astron. Astrophys. 461, 775-781 (2007).
[CrossRef]

J. Opt. Soc. Am. A

Mon. Not. R. Astron. Soc.

T. Butterley, R. Wilson, and M. Sarazin, "Determination of the profile of atmospheric optical turbulence strength from SLODAR data," Mon. Not. R. Astron. Soc. 369, 835-845 (2006).
[CrossRef]

Nature

J. Lawrence, M. Ashley, A. Tokovinin, and T. Travouillon, "Exceptional astronomical seeing conditions above Dome C in Antarctica," Nature 431, 278-281 (2004).
[CrossRef]

Other

A. Tokovinin, National Optical Astronomy Observatory: MASS presentation, http://www.ctio.noao.edu/∼atokovin/profiler/(2006).

M. Sarazin and A. Tokovinin, "The statistics of isoplanatic angle and adaptive optics time constant derived from DIMM data," in Beyond Conventional Adaptive Optics, S. Esposito and R. Ragazzoni, eds., Vol. 58 of ESO Conference and Workshop Proceedings (European Southern Observatory, 2001), pp. 321-328.

European Centre for Medium-Range Weather Forecasts, http://www.ecmwf.int/.

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