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 Pachon. In particular, the integrated turb...
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ftcern:oai:cds.cern.ch:944308 2023-05-15T13:41:28+02:00 Atmospheric scintillation at Dome C, Antarctica: implications for photometry and astrometry Kenyon, S L Ashley, M C B Fossat, E Lawrence, J S Storey, J W V Tokovinin, A 2006-04-26 http://cds.cern.ch/record/944308 eng eng http://cds.cern.ch/record/944308 astro-ph/0604538 oai:cds.cern.ch:944308 Astrophysics and Astronomy 2006 ftcern 2018-07-28T08:12:37Z 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 Pachon. 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. Other/Unknown Material Antarc* Antarctica CERN Document Server (CDS) |
institution |
Open Polar |
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CERN Document Server (CDS) |
op_collection_id |
ftcern |
language |
English |
topic |
Astrophysics and Astronomy |
spellingShingle |
Astrophysics and Astronomy Kenyon, S L Ashley, M C B Fossat, E Lawrence, J S Storey, J W V Tokovinin, A Atmospheric scintillation at Dome C, Antarctica: implications for photometry and astrometry |
topic_facet |
Astrophysics and Astronomy |
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 Pachon. 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. |
author |
Kenyon, S L Ashley, M C B Fossat, E Lawrence, J S Storey, J W V Tokovinin, A |
author_facet |
Kenyon, S L Ashley, M C B Fossat, E Lawrence, J S Storey, J W V Tokovinin, A |
author_sort |
Kenyon, S L |
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://cds.cern.ch/record/944308 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
http://cds.cern.ch/record/944308 astro-ph/0604538 oai:cds.cern.ch:944308 |
_version_ |
1766151197641670656 |