Duty Cycle of Doppler Ground‐based Asteroseismic Observations

• Published in: Publications of the Astronomical Society of the Pacific
• Main Authors: Mosser, Benoit, Aristidi, Eric
• Other Authors: Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), 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 (UniCA)-Université Côte d'Azur (UniCA)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2007
• Subjects: Instrumentation: Interferometers; Instrumentation: Spectrographs; Site Testing; stars: oscillations (including pulsations); Techniques: Radial Velocities; [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]; Antarc*; Antarctica
• Online Access: https://hal.science/hal-02455069; https://doi.org/10.1086/511336

International audience We report the observations of the clear-sky fraction at the Concordia station during winter 2006 and derive from it the duty cycle for the astronomical observations. The duty cycle and observation duration at Dome C allow for efficient asteroseismic observations. This performance is analyzed and compared to network observations. For network observations, simulations were run using the helioseismic Global Oscillation Network Group as a reference. Observations with one site in Antarctica provide performance similar to or better than that with a six-site network, since the duty cycle limited by meteorology is as high as 92%. On bright targets, a 100 day long time series with a duty cycle of about 87% can be observed, which is not possible for a network observation. Based on observations made by E. Aristidi during the 2006 second overwinter at the French-Italian Concordia Station, Dome C, Antarctica.