Atmospheric scintillation at Dome C, Antarctica: implications for photometry and astrometry
We present low-resolution turbulence profiles of the atmosphere above Dome C, Antarctica, measured with the MASS instrument during 25 nights in March – May 2004. Except for the lowest layer, Dome C has significantly less turbulence than Cerro Tololo and Cerro Pachón. In particular, the integrated tu...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.256.6385 2023-05-15T13:53:58+02:00 Atmospheric scintillation at Dome C, Antarctica: implications for photometry and astrometry S. L. Kenyon J. S. Lawrence M. C. B. Ashley J. W. V. Storey A. Tokovinin E. Fossat The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.256.6385 http://arxiv.org/pdf/astro-ph/0604538v1.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.256.6385 http://arxiv.org/pdf/astro-ph/0604538v1.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://arxiv.org/pdf/astro-ph/0604538v1.pdf text 2006 ftciteseerx 2016-01-07T19:58:13Z We present low-resolution turbulence profiles of the atmosphere above Dome C, Antarctica, measured with the MASS instrument during 25 nights in March – May 2004. Except for the lowest layer, Dome C has significantly less turbulence than Cerro Tololo and Cerro Pachón. 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 mid-latitude 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 estimates are preliminary, being computed with average wind-speed profiles, but the validity of our approach is confirmed by independent data. Although the data from Dome C cover a fairly limited time frame, they lend strong support to expectations that Dome C will offer significant advantages for photometric and astrometric studies. Subject headings: Astrometry — atmospheric effects — site testing — turbulence 1. Text Antarc* Antarctica Unknown |
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English |
description |
We present low-resolution turbulence profiles of the atmosphere above Dome C, Antarctica, measured with the MASS instrument during 25 nights in March – May 2004. Except for the lowest layer, Dome C has significantly less turbulence than Cerro Tololo and Cerro Pachón. 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 mid-latitude 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 estimates are preliminary, being computed with average wind-speed profiles, but the validity of our approach is confirmed by independent data. Although the data from Dome C cover a fairly limited time frame, they lend strong support to expectations that Dome C will offer significant advantages for photometric and astrometric studies. Subject headings: Astrometry — atmospheric effects — site testing — turbulence 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
S. L. Kenyon J. S. Lawrence M. C. B. Ashley J. W. V. Storey A. Tokovinin E. Fossat |
spellingShingle |
S. L. Kenyon J. S. Lawrence M. C. B. Ashley J. W. V. Storey A. Tokovinin E. Fossat Atmospheric scintillation at Dome C, Antarctica: implications for photometry and astrometry |
author_facet |
S. L. Kenyon J. S. Lawrence M. C. B. Ashley J. W. V. Storey A. Tokovinin E. Fossat |
author_sort |
S. L. Kenyon |
title |
Atmospheric scintillation at Dome C, Antarctica: implications for photometry and astrometry |
title_short |
Atmospheric scintillation at Dome C, Antarctica: implications for photometry and astrometry |
title_full |
Atmospheric scintillation at Dome C, Antarctica: implications for photometry and astrometry |
title_fullStr |
Atmospheric scintillation at Dome C, Antarctica: implications for photometry and astrometry |
title_full_unstemmed |
Atmospheric scintillation at Dome C, Antarctica: implications for photometry and astrometry |
title_sort |
atmospheric scintillation at dome c, antarctica: implications for photometry and astrometry |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.256.6385 http://arxiv.org/pdf/astro-ph/0604538v1.pdf |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
http://arxiv.org/pdf/astro-ph/0604538v1.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.256.6385 http://arxiv.org/pdf/astro-ph/0604538v1.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766259473246060544 |