Thermalizing a telescope in Antarctica: Analysis of ASTEP observations
International audience The installation and operation of a telescope in Antarctica represent particular challenges, in particular the requirement to operate at extremely cold temperatures, to cope with rapid temperature fluctuations and to prevent frosting. Heating of electronic subsystems is a nece...
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ftinsu:oai:HAL:hal-01164626v1 2023-12-17T10:20:55+01:00 Thermalizing a telescope in Antarctica: Analysis of ASTEP observations Guillot, Tristan Abe, Lyu Agabi, Abdelkrim Rivet, Jean-Pierre Daban, Jean-Baptiste Mekarnia, Djamel Aristidi, Eric Schmider, Francois-Xavier Crouzet, Nicolas Gonçalves, Ivan Gouvret, Carole Ottogalli, Sébastien Faradji, Hélène Blanc, Pierre-Eric Bondoux, Eric Valbousquet, Franck Joseph Louis LAGRANGE (LAGRANGE) Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS) University of Toronto Observatoire de Haute-Provence (OHP) Institut Pythéas (OSU PYTHEAS) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS) Optique et Vision Secteur privé 2015 https://hal.science/hal-01164626 https://hal.science/hal-01164626/document https://hal.science/hal-01164626/file/astep_turbulence_arxiv.pdf en eng HAL CCSD Wiley-VCH Verlag info:eu-repo/semantics/altIdentifier/arxiv/1506.06009 hal-01164626 https://hal.science/hal-01164626 https://hal.science/hal-01164626/document https://hal.science/hal-01164626/file/astep_turbulence_arxiv.pdf ARXIV: 1506.06009 info:eu-repo/semantics/OpenAccess ISSN: 0004-6337 EISSN: 1521-3994 Astronomical Notes / Astronomische Nachrichten https://hal.science/hal-01164626 Astronomical Notes / Astronomische Nachrichten, 2015, pp.1-21 [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] info:eu-repo/semantics/article Journal articles 2015 ftinsu 2023-11-22T17:51:24Z International audience The installation and operation of a telescope in Antarctica represent particular challenges, in particular the requirement to operate at extremely cold temperatures, to cope with rapid temperature fluctuations and to prevent frosting. Heating of electronic subsystems is a necessity, but solutions must be found to avoid the turbulence induced by temperature fluctua- tions on the optical paths. ASTEP 400 is a 40 cm Newton telescope installed at the Concordia station, Dome C since 2010 for photometric observations of fields of stars and their exoplanets. While the telescope is designed to spread star light on several pixels to maximize photometric stability, we show that it is nonetheless sensitive to the extreme variations of the seeing at the ground level (between about 0.1 and 5 arcsec) and to temperature fluctuations between −30◦C and −80◦C. We analyze both day-time and night-time observations and obtain the magnitude of the seeing caused by the mirrors, dome and camera. The most important effect arises from the heating of the primary mirror which gives rise to a mirror seeing of 0.23 arcsec K−1 . We propose solutions to mitigate these effects. Article in Journal/Newspaper Antarc* Antarctica Institut national des sciences de l'Univers: HAL-INSU Concordia Station ENVELOPE(123.333,123.333,-75.100,-75.100) |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] |
spellingShingle |
[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] Guillot, Tristan Abe, Lyu Agabi, Abdelkrim Rivet, Jean-Pierre Daban, Jean-Baptiste Mekarnia, Djamel Aristidi, Eric Schmider, Francois-Xavier Crouzet, Nicolas Gonçalves, Ivan Gouvret, Carole Ottogalli, Sébastien Faradji, Hélène Blanc, Pierre-Eric Bondoux, Eric Valbousquet, Franck Thermalizing a telescope in Antarctica: Analysis of ASTEP observations |
topic_facet |
[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] |
description |
International audience The installation and operation of a telescope in Antarctica represent particular challenges, in particular the requirement to operate at extremely cold temperatures, to cope with rapid temperature fluctuations and to prevent frosting. Heating of electronic subsystems is a necessity, but solutions must be found to avoid the turbulence induced by temperature fluctua- tions on the optical paths. ASTEP 400 is a 40 cm Newton telescope installed at the Concordia station, Dome C since 2010 for photometric observations of fields of stars and their exoplanets. While the telescope is designed to spread star light on several pixels to maximize photometric stability, we show that it is nonetheless sensitive to the extreme variations of the seeing at the ground level (between about 0.1 and 5 arcsec) and to temperature fluctuations between −30◦C and −80◦C. We analyze both day-time and night-time observations and obtain the magnitude of the seeing caused by the mirrors, dome and camera. The most important effect arises from the heating of the primary mirror which gives rise to a mirror seeing of 0.23 arcsec K−1 . We propose solutions to mitigate these effects. |
author2 |
Joseph Louis LAGRANGE (LAGRANGE) Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS) University of Toronto Observatoire de Haute-Provence (OHP) Institut Pythéas (OSU PYTHEAS) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS) Optique et Vision Secteur privé |
format |
Article in Journal/Newspaper |
author |
Guillot, Tristan Abe, Lyu Agabi, Abdelkrim Rivet, Jean-Pierre Daban, Jean-Baptiste Mekarnia, Djamel Aristidi, Eric Schmider, Francois-Xavier Crouzet, Nicolas Gonçalves, Ivan Gouvret, Carole Ottogalli, Sébastien Faradji, Hélène Blanc, Pierre-Eric Bondoux, Eric Valbousquet, Franck |
author_facet |
Guillot, Tristan Abe, Lyu Agabi, Abdelkrim Rivet, Jean-Pierre Daban, Jean-Baptiste Mekarnia, Djamel Aristidi, Eric Schmider, Francois-Xavier Crouzet, Nicolas Gonçalves, Ivan Gouvret, Carole Ottogalli, Sébastien Faradji, Hélène Blanc, Pierre-Eric Bondoux, Eric Valbousquet, Franck |
author_sort |
Guillot, Tristan |
title |
Thermalizing a telescope in Antarctica: Analysis of ASTEP observations |
title_short |
Thermalizing a telescope in Antarctica: Analysis of ASTEP observations |
title_full |
Thermalizing a telescope in Antarctica: Analysis of ASTEP observations |
title_fullStr |
Thermalizing a telescope in Antarctica: Analysis of ASTEP observations |
title_full_unstemmed |
Thermalizing a telescope in Antarctica: Analysis of ASTEP observations |
title_sort |
thermalizing a telescope in antarctica: analysis of astep observations |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01164626 https://hal.science/hal-01164626/document https://hal.science/hal-01164626/file/astep_turbulence_arxiv.pdf |
long_lat |
ENVELOPE(123.333,123.333,-75.100,-75.100) |
geographic |
Concordia Station |
geographic_facet |
Concordia Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
ISSN: 0004-6337 EISSN: 1521-3994 Astronomical Notes / Astronomische Nachrichten https://hal.science/hal-01164626 Astronomical Notes / Astronomische Nachrichten, 2015, pp.1-21 |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/1506.06009 hal-01164626 https://hal.science/hal-01164626 https://hal.science/hal-01164626/document https://hal.science/hal-01164626/file/astep_turbulence_arxiv.pdf ARXIV: 1506.06009 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1785527605796012032 |