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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 693894.0, MPI für Astronomie / Publikationen_mpia
HATSouth: a global network of fully automated identical wide-field telescopes
Authors:Bakos, G. Á.; Csubry, Z.; Penev, K.; Bayliss, D.; Jordán, A.; Afonso, C.; Hartman, J. D.; Henning, T.; Kovács, G.; Noyes, R. W.; Béky, B.; Suc, V.; Csák, B.; Rabus, M.; Lázár, J.; Papp, I.; Sári, P.; Conroy, P.; Zhou, G.; Sackett, P. D.; Schmidt, B.; Mancini, L.; Sasselov, D. D.; Ueltzhoeffer, K.
Date of Publication (YYYY-MM-DD):2013
Title of Journal:Publications of the Astronomical Society of the Pacific
Issue / Number:924
Start Page:154
End Page:182
Audience:Not Specified
Abstract / Description:HATSouth is the world's first network of automated and homogeneous telescopes that is capable of year-round 24-hour monitoring of positions over an entire hemisphere of the sky. The primary scientific goal of the network is to discover and characterize a large number of transiting extrasolar planets, reaching out to long periods and down to small planetary radii. HATSouth achieves this by monitoring extended areas on the sky, deriving high precision light curves for a large number of stars, searching for the signature of planetary transits, and confirming planetary candidates with larger telescopes. HATSouth employs 6 telescope units spread over 3 locations with large longitude separation in the southern hemisphere (Las Campanas Observatory, Chile; HESS site, Namibia; Siding Spring Observatory, Australia). Each of the HATSouth units holds four 0.18m diameter f/2.8 focal ratio telescope tubes on a common mount producing an 8.2x8.2 arcdeg field, imaged using four 4Kx4K CCD cameras and Sloan r filters, to give a pixel scale of 3.7 arcsec/pixel. The HATSouth network is capable of continuously monitoring 128 square arc-degrees. We present the technical details of the network, summarize operations, and present weather statistics for the 3 sites. On average each of the 6 HATSouth units has conducted observations on ~500 nights over a 2-year time period, yielding a total of more than 1million science frames at 4 minute integration time, and observing ~10.65 hours per day on average. We describe the scheme of our data transfer and reduction from raw pixel images to trend-filtered light curves and transiting planet candidates. Photometric precision reaches ~6 mmag at 4-minute cadence for the brightest non-saturated stars at r~10.5. We present detailed transit recovery simulations to determine the expected yield of transiting planets from HATSouth. (abridged)
Free Keywords:Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Instrumentation and Methods for Astrophysics; Astrophysics - Solar and Stellar Astrophysics
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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