ASTEP South: An Antarctic Search for Transiting Planets around the celestial South pole

• Main Authors: Crouzet, Nicolas, Agabi, Karim, Blazit, Alain, Bonhomme, Serge, Fanteï-Caujolle, Yan, Fressin, François, Guillot, Tristan, Schmider, François-Xavier, Valbousquet, Franck, Bondoux, Erick, Challita, Zalpha, Abe, Lyu, Daban, Jean-Baptiste, Gouvret, Carole
• Other Authors: Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE), 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), Laboratoire Hippolyte Fizeau (FIZEAU), Optique et Vision, Secteur privé, L'Institut polaire français Paul-Emile Victor (IPEV), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), ASTEP, ANR-06-BLAN-0043,A STEP,A STEP: an Antarctic Search for Transiting Extrasolar Planets(2006)
• Format: Report
• Language: English
• Published: HAL CCSD 2008
• Subjects: [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]; [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]; Antarctic; South Pole; Antarc*; Antarctica; South pole
• Online Access: https://hal.science/hal-00324026; https://hal.science/hal-00324026/document; https://hal.science/hal-00324026/file/ProceedingBoston.pdf

ASTEP South is the first phase of the ASTEP project that aims to determine the quality of Dome C as a site for future photometric searches for transiting exoplanets and discover extrasolar planets from the Concordia base in Antarctica. ASTEP South consists of a front-illuminated 4k x 4k CCD camera, a 10 cm refractor, and a simple mount in a thermalized enclosure. A double-glass window is used to reduce temperature variations and its accompanying turbulence on the optical path. The telescope is fixed and observes a 4 x 4 square degrees field of view centered on the celestial South pole. With this design, A STEP South is very stable and observes with low and constant airmass, both being important issues for photometric precision. We present the project, we show that enough stars are present in our field of view to allow the detection of one to a few transiting giant planets, and that the photometric precision of the instrument should be a few mmag for stars brighter than magnitude 12 and better than 10 mmag for stars of magnitude 14 or less.