UBVRI twilight sky brightness at ESO-Paranal
Twilight studies have proved to be important tools to analyze the atmospheric structure with interesting consequences on the characterization of astronomical sites. Active discussions on this topic have been recently restarted in connection with the evaluation of Dome C, Antarctica as a potential as...
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ftdatacite:10.48550/arxiv.astro-ph/0604128 2023-05-15T13:38:49+02:00 UBVRI twilight sky brightness at ESO-Paranal Patat, F. Ugolnikov, O. Postylyako, O. 2006 https://dx.doi.org/10.48550/arxiv.astro-ph/0604128 https://arxiv.org/abs/astro-ph/0604128 unknown arXiv https://dx.doi.org/10.1051/0004-6361:20064992 Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ Astrophysics astro-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2006 ftdatacite https://doi.org/10.48550/arxiv.astro-ph/0604128 https://doi.org/10.1051/0004-6361:20064992 2022-04-01T15:43:14Z Twilight studies have proved to be important tools to analyze the atmospheric structure with interesting consequences on the characterization of astronomical sites. Active discussions on this topic have been recently restarted in connection with the evaluation of Dome C, Antarctica as a potential astronomical site and several site-testing experiments, including twilight brightness measurements, are being prepared. The present work provides for the first time absolute photometric measurements of twilight sky brightness for ESO-Paranal (Chile), which are meant both as a contribution to the site monitoring and as reference values in the analysis of other sites, including Dome C. The UBVRI twilight sky brightness was estimated on more than 2000 FORS1 archival images, which include both flats and standard stars observations taken in twilight, covering a Sun zenith distance range 94-112 deg. The comparison with a low altitude site shows that Paranal V twilight sky brightness is about 30% lower, implying that some fraction of multiple scattering has to take place at an altitude of a few km above the sea level. : 11 pages, 13 figures, accepted for publication in A&A Text Antarc* Antarctica DataCite Metadata Store (German National Library of Science and Technology) |
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Astrophysics astro-ph FOS Physical sciences |
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Astrophysics astro-ph FOS Physical sciences Patat, F. Ugolnikov, O. Postylyako, O. UBVRI twilight sky brightness at ESO-Paranal |
topic_facet |
Astrophysics astro-ph FOS Physical sciences |
description |
Twilight studies have proved to be important tools to analyze the atmospheric structure with interesting consequences on the characterization of astronomical sites. Active discussions on this topic have been recently restarted in connection with the evaluation of Dome C, Antarctica as a potential astronomical site and several site-testing experiments, including twilight brightness measurements, are being prepared. The present work provides for the first time absolute photometric measurements of twilight sky brightness for ESO-Paranal (Chile), which are meant both as a contribution to the site monitoring and as reference values in the analysis of other sites, including Dome C. The UBVRI twilight sky brightness was estimated on more than 2000 FORS1 archival images, which include both flats and standard stars observations taken in twilight, covering a Sun zenith distance range 94-112 deg. The comparison with a low altitude site shows that Paranal V twilight sky brightness is about 30% lower, implying that some fraction of multiple scattering has to take place at an altitude of a few km above the sea level. : 11 pages, 13 figures, accepted for publication in A&A |
format |
Text |
author |
Patat, F. Ugolnikov, O. Postylyako, O. |
author_facet |
Patat, F. Ugolnikov, O. Postylyako, O. |
author_sort |
Patat, F. |
title |
UBVRI twilight sky brightness at ESO-Paranal |
title_short |
UBVRI twilight sky brightness at ESO-Paranal |
title_full |
UBVRI twilight sky brightness at ESO-Paranal |
title_fullStr |
UBVRI twilight sky brightness at ESO-Paranal |
title_full_unstemmed |
UBVRI twilight sky brightness at ESO-Paranal |
title_sort |
ubvri twilight sky brightness at eso-paranal |
publisher |
arXiv |
publishDate |
2006 |
url |
https://dx.doi.org/10.48550/arxiv.astro-ph/0604128 https://arxiv.org/abs/astro-ph/0604128 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://dx.doi.org/10.1051/0004-6361:20064992 |
op_rights |
Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ |
op_doi |
https://doi.org/10.48550/arxiv.astro-ph/0604128 https://doi.org/10.1051/0004-6361:20064992 |
_version_ |
1766111378145280000 |