Observing exoplanets from Antarctica in two colours: set-up and operation of ASTEP+
International audience On December 2021, a new camera box for two-colour simultaneous visible photometry was successfully installed on the ASTEP telescope at the Concordia station in Antarctica. The new focal box offers increased capabilities for the ASTEP+ project. The opto-mechanical design of the...
Published in: | Ground-based and Airborne Telescopes IX |
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Main Authors: | , , , , , , , , , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Online Access: | https://hal.science/hal-04104874 https://hal.science/hal-04104874/document https://hal.science/hal-04104874/file/view%282%29.pdf https://doi.org/10.1117/12.2628952 |
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ftinsu:oai:HAL:hal-04104874v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Exoplanets transit Antarctica Concordia station TESS photometry [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] |
spellingShingle |
Exoplanets transit Antarctica Concordia station TESS photometry [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] Schmider, François-Xavier Abe, Lyu Agabi, Karim Bendjoya, Philippe Crouzet, Nicolas Dransfield, Georgina Guillot, Tristan Lai, Olivier Mekarnia, Djamel Suarez, Olga Triaud, Amaury Stee, Philippe Günther, Maximilian Breeveld, Dennis Blommaert, Sander Observing exoplanets from Antarctica in two colours: set-up and operation of ASTEP+ |
topic_facet |
Exoplanets transit Antarctica Concordia station TESS photometry [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] |
description |
International audience On December 2021, a new camera box for two-colour simultaneous visible photometry was successfully installed on the ASTEP telescope at the Concordia station in Antarctica. The new focal box offers increased capabilities for the ASTEP+ project. The opto-mechanical design of the camera was described in a previous paper. 1 Here, we focus on the laboratory tests of each of the two cameras, the low-temperature behaviour of the focal box in a thermal chamber, the on-site installation and alignment of the new focal box on the telescope, the measurement of the turbulence in the tube and the operation of the telescope equipped with the new focal box. We also describe the data acquisition and the telescope guiding procedure and provide a first assessment of the performances reached during the first part of the 2022 observation campaign. Observations of the WASP19 field, already observed previously with ASTEP, demonstrates an improvement of the SNR by a factor 1.7, coherent with an increased number of photon by a factor of 3. The throughput of the two cameras is assessed both by calculation of the characteristics of the optics and quantum efficiency of the cameras, and by direct observations on the sky. We find that the ASTEP+ two-colour transmission curves (with a dichroic separating the fluxes at 690nm) are similar to those of GAIA in the blue and red channels, but with a lower transmission in the ASTEP+ red channel leading to a 1.5 magnitude higher B-R value compared to the GAIA B-R value. With this new setting, the ASTEP+ telescope will ensure the follow-up and the characterization of a large number of exoplanetary transits in the coming years in view of the future space missions JWST and Ariel. |
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) School of Physics and Astronomy Birmingham University of Birmingham Birmingham Laboratoire Gemini (LG) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ESA - ESTEC (Netherlands) |
format |
Article in Journal/Newspaper |
author |
Schmider, François-Xavier Abe, Lyu Agabi, Karim Bendjoya, Philippe Crouzet, Nicolas Dransfield, Georgina Guillot, Tristan Lai, Olivier Mekarnia, Djamel Suarez, Olga Triaud, Amaury Stee, Philippe Günther, Maximilian Breeveld, Dennis Blommaert, Sander |
author_facet |
Schmider, François-Xavier Abe, Lyu Agabi, Karim Bendjoya, Philippe Crouzet, Nicolas Dransfield, Georgina Guillot, Tristan Lai, Olivier Mekarnia, Djamel Suarez, Olga Triaud, Amaury Stee, Philippe Günther, Maximilian Breeveld, Dennis Blommaert, Sander |
author_sort |
Schmider, François-Xavier |
title |
Observing exoplanets from Antarctica in two colours: set-up and operation of ASTEP+ |
title_short |
Observing exoplanets from Antarctica in two colours: set-up and operation of ASTEP+ |
title_full |
Observing exoplanets from Antarctica in two colours: set-up and operation of ASTEP+ |
title_fullStr |
Observing exoplanets from Antarctica in two colours: set-up and operation of ASTEP+ |
title_full_unstemmed |
Observing exoplanets from Antarctica in two colours: set-up and operation of ASTEP+ |
title_sort |
observing exoplanets from antarctica in two colours: set-up and operation of astep+ |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-04104874 https://hal.science/hal-04104874/document https://hal.science/hal-04104874/file/view%282%29.pdf https://doi.org/10.1117/12.2628952 |
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: 0277-786X EISSN: 1996-756X Proceedings of SPIE, the International Society for Optical Engineering https://hal.science/hal-04104874 Proceedings of SPIE, the International Society for Optical Engineering, 2022, Ground-based and Airborne Telescopes IX, 12182, pp.1218220. ⟨10.1117/12.2628952⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/2305.08454 info:eu-repo/semantics/altIdentifier/doi/10.1117/12.2628952 hal-04104874 https://hal.science/hal-04104874 https://hal.science/hal-04104874/document https://hal.science/hal-04104874/file/view%282%29.pdf ARXIV: 2305.08454 doi:10.1117/12.2628952 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1117/12.2628952 |
container_title |
Ground-based and Airborne Telescopes IX |
container_start_page |
133 |
_version_ |
1779309338666467328 |
spelling |
ftinsu:oai:HAL:hal-04104874v1 2023-10-09T21:46:48+02:00 Observing exoplanets from Antarctica in two colours: set-up and operation of ASTEP+ Schmider, François-Xavier Abe, Lyu Agabi, Karim Bendjoya, Philippe Crouzet, Nicolas Dransfield, Georgina Guillot, Tristan Lai, Olivier Mekarnia, Djamel Suarez, Olga Triaud, Amaury Stee, Philippe Günther, Maximilian Breeveld, Dennis Blommaert, Sander 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) School of Physics and Astronomy Birmingham University of Birmingham Birmingham Laboratoire Gemini (LG) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ESA - ESTEC (Netherlands) 2022 https://hal.science/hal-04104874 https://hal.science/hal-04104874/document https://hal.science/hal-04104874/file/view%282%29.pdf https://doi.org/10.1117/12.2628952 en eng HAL CCSD SPIE, The International Society for Optical Engineering info:eu-repo/semantics/altIdentifier/arxiv/2305.08454 info:eu-repo/semantics/altIdentifier/doi/10.1117/12.2628952 hal-04104874 https://hal.science/hal-04104874 https://hal.science/hal-04104874/document https://hal.science/hal-04104874/file/view%282%29.pdf ARXIV: 2305.08454 doi:10.1117/12.2628952 info:eu-repo/semantics/OpenAccess ISSN: 0277-786X EISSN: 1996-756X Proceedings of SPIE, the International Society for Optical Engineering https://hal.science/hal-04104874 Proceedings of SPIE, the International Society for Optical Engineering, 2022, Ground-based and Airborne Telescopes IX, 12182, pp.1218220. ⟨10.1117/12.2628952⟩ Exoplanets transit Antarctica Concordia station TESS photometry [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] info:eu-repo/semantics/article Journal articles 2022 ftinsu https://doi.org/10.1117/12.2628952 2023-09-13T16:24:44Z International audience On December 2021, a new camera box for two-colour simultaneous visible photometry was successfully installed on the ASTEP telescope at the Concordia station in Antarctica. The new focal box offers increased capabilities for the ASTEP+ project. The opto-mechanical design of the camera was described in a previous paper. 1 Here, we focus on the laboratory tests of each of the two cameras, the low-temperature behaviour of the focal box in a thermal chamber, the on-site installation and alignment of the new focal box on the telescope, the measurement of the turbulence in the tube and the operation of the telescope equipped with the new focal box. We also describe the data acquisition and the telescope guiding procedure and provide a first assessment of the performances reached during the first part of the 2022 observation campaign. Observations of the WASP19 field, already observed previously with ASTEP, demonstrates an improvement of the SNR by a factor 1.7, coherent with an increased number of photon by a factor of 3. The throughput of the two cameras is assessed both by calculation of the characteristics of the optics and quantum efficiency of the cameras, and by direct observations on the sky. We find that the ASTEP+ two-colour transmission curves (with a dichroic separating the fluxes at 690nm) are similar to those of GAIA in the blue and red channels, but with a lower transmission in the ASTEP+ red channel leading to a 1.5 magnitude higher B-R value compared to the GAIA B-R value. With this new setting, the ASTEP+ telescope will ensure the follow-up and the characterization of a large number of exoplanetary transits in the coming years in view of the future space missions JWST and Ariel. 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) Ground-based and Airborne Telescopes IX 133 |