CONCERTO at APEX -- On-sky performance in continuum
Rattachement africain : fr, es. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
We present the data-processing algorithms and the performance of CONCERTO (CarbON CII line in post-rEionisation and ReionisaTiOn epoch) in continuum by analysing the data from the commissioning and scientific observations. The beam pattern is characterized by an effective FWHM of 31.9 $\pm$ 0.6" and 34.4 $\pm$ 1.0" for high-frequency (HF) and low-frequency (LF) bands. The main beam is slightly elongated with a mean eccentricity of 0.46. Two error beams of $\sim$65" and $\sim$130" are characterized, enabling the estimate of a main beam efficiency of $\sim$0.52. The field of view is accurately reconstructed and presents coherent distortions between the HF and LF arrays. LEKID parameters were robustly determined for 80% of the read tones. Cross-talks between LEKIDs are the first cause of flagging, followed by an excess of eccentricity for $\sim$10% of the LEKIDs, all located in a given region of the field of view. On the 44 scans of Uranus selected for the absolute photometric calibration, 72.5% and 78.2% of the LEKIDs are selected as valid detectors with a probability >70%. By comparing Uranus measurements with a model, we obtain calibration factors of 19.5$\pm$0.6 [Hz/Jy] and 25.6$\pm$0.9 [Hz/Jy] for HF and LF. The point-source continuum measurement uncertainties are 3.0% and 3.4% for HF and LF bands. The RMS of CONCERTO maps is verified to evolve as proportional to the inverse square root of integration time. The measured NEFDs for HF and LF are 115$\pm$2 mJy/beam$\cdot$s$^{1/2}$ and 95$\pm$1 mJy/beam$\cdot$s$^{1/2}$, obtained using CONCERTO data on the COSMOS field for a mean precipitable water vapour and elevation of 0.81 mm and 55.7 deg. CONCERTO demonstrates unique capabilities in fast dual-band spectral mapping with a $\sim$18.5' instantaneous field-of-view. CONCERTO's performance in continuum is perfectly in line with expectations.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
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Laboratoire d’Astrophysique de Marseille pays non établi dans la noticeStructure de recherche
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Château Gombert pays non établi dans la noticeInstitution
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Institut Néel pays non établi dans la noticeStructure de recherche
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Observatoire astronomique de Strasbourg pays non établi dans la noticeStructure de recherche
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Laboratoire de Physique Subatomique et de Cosmologie pays non établi dans la noticeStructure de recherche
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Institut de Planétologie et d'Astrophysique de Grenoble pays non établi dans la noticeStructure de recherche
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Instituto de Radioastronomía Milimétrica pays non établi dans la noticeStructure de recherche
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Laboratoire d’études spatiales et d’instrumentation en astrophysique pays non établi dans la noticeStructure de recherche
Laboratoire d’Astrophysique de Marseille, Château Gombert et Institut Néel, avec 5 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.