دورية أكاديمية
Telluric correction in the near-infrared: Standard star or synthetic transmission?
| العنوان: | Telluric correction in the near-infrared: Standard star or synthetic transmission? |
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| المؤلفون: | Ulmer-Moll, S., Figueira, P., Neal, J. J., Santos, N. C., Bonnefoy, M. |
| المساهمون: | Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) |
| المصدر: | ISSN: 0004-6361. |
| بيانات النشر: | HAL CCSD EDP Sciences |
| سنة النشر: | 2019 |
| المجموعة: | Université Savoie Mont Blanc: HAL |
| مصطلحات موضوعية: | atmospheric effects, radiative transfer, instrumentation: spectrographs, methods: data analysis, techniques: spectroscopic, Astrophysics - Instrumentation and Methods for Astrophysics, [SDU]Sciences of the Universe [physics], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] |
| الوصف: | International audience ; Context. The atmospheric absorption of the Earth is an important limiting factor for ground-based spectroscopic observations and the near-infrared and infrared regions are the most affected. Several software packages that produce a synthetic atmospheric transmission spectrum have been developed to correct for the telluric absorption; these are Molecfit, TelFit, and Transmissions Atmosphériques Personnalisées pour l'AStronomie (TAPAS). Aims: Our goal is to compare the correction achieved using these three telluric correction packages and the division by a telluric standard star. We want to evaluate the best method to correct near-infrared high-resolution spectra as well as the limitations of each software package and methodology. Methods: We applied the telluric correction methods to CRIRES archival data taken in the J and K bands. We explored how the achieved correction level varies depending on the atmospheric T-P profile used in the modelling, the depth of the atmospheric lines, and the molecules creating the absorption. Results: We found that the Molecfit and TelFit corrections lead to smaller residuals for the water lines. The standard star method corrects best the oxygen lines. The Molecfit package and the standard star method corrections result in global offsets always below 0.5% for all lines; the offset is similar with TelFit and TAPAS for the H 2 O lines and around 1% for the O 2 lines. All methods and software packages result in a scatter between 3% and 7% inside the telluric lines. The use of a tailored atmospheric profile for the observatory leads to a scatter two times smaller, and the correction level improves with lower values of precipitable water vapour. Conclusions: The synthetic transmission methods lead to an improved correction compared to the standard star method for the water lines in the J band with no loss of telescope time, but the oxygen lines were better corrected by the standard star method. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/arxiv/1811.08915; insu-03704149; https://insu.hal.science/insu-03704149Test; https://insu.hal.science/insu-03704149/documentTest; https://insu.hal.science/insu-03704149/file/aa33282-18.pdfTest; ARXIV: 1811.08915; BIBCODE: 2019A&A.621A.79U |
| DOI: | 10.1051/0004-6361/201833282 |
| الإتاحة: | https://doi.org/10.1051/0004-6361/201833282Test https://insu.hal.science/insu-03704149Test https://insu.hal.science/insu-03704149/documentTest https://insu.hal.science/insu-03704149/file/aa33282-18.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.C8765654 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1051/0004-6361/201833282 |
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