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Publications of the Astronomical Society of the Pacific, 118: 924932, 2006 June 2006. The Astronomical Society of the Pacific. All rights reserved. Printed in U.S.A.
 

Summary: 924
Publications of the Astronomical Society of the Pacific, 118: 924­932, 2006 June
2006. The Astronomical Society of the Pacific. All rights reserved. Printed in U.S.A.
Atmospheric Scintillation at Dome C, Antarctica: Implications for Photometry
and Astrometry
S. L. Kenyon, J. S. Lawrence, M. C. B. Ashley, and J. W. V. Storey
School of Physics, University of New South Wales, Sydney, NSW 2052, Australia; suzanne@phys.unsw.edu.au
A. Tokovinin
Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile
and
E. Fossat
Laboratoire Universitaire d'Astrophysique de Nice, UniversiteŽ de Nice, France
Received 2006 April 5; accepted 2006 April 26; published 2006 June 21
ABSTRACT. We present low-resolution turbulence profiles of the atmosphere above Dome C, Antarctica,
measured with the MASS instrument during 25 nights in 2004 March­May. Except for the lowest layer, Dome
C has significantly less turbulence than Cerro Tololo and Cerro PachoŽn. In particular, the integrated turbulence
at 16 km is always less than the median values at the two Chilean sites. From these profiles we evaluate the
photometric noise produced by scintillation, and the atmospheric contribution to the error budget in narrow-angle
differential astrometry. In comparison with the two midlatitude sites in Chile, Dome C offers a potential gain of
about 3.6 in both photometric precision (for long integrations) and narrow-angle astrometry precision. These gain

  

Source: Ashley, Michael C. B. - School of Physics, University of New South Wales
Tokovinin, Andrei A. - Cerro Tololo Inter-American Observatory

 

Collections: Physics