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Title:
A SuperWASP search for additional transiting planets in 24 known systems
Authors:
Smith, A. M. S.; Hebb, L.; Collier Cameron, A.; Anderson, D. R.; Lister, T. A.; Hellier, C.; Pollacco, D.; Queloz, D.; Skillen, I.; West, R. G.
Affiliation:
AA(SUPA (Scottish Universities Physics Alliance), School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS), AB(SUPA (Scottish Universities Physics Alliance), School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS), AC(SUPA (Scottish Universities Physics Alliance), School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS), AD(Astrophysics Group, Keele University, Staffordshire ST5 5BG), AE(Las Cumbres Observatory, 6740 Cortona Dr. Suite 102, Santa Barbara, CA 93117, USA), AF(Astrophysics Group, Keele University, Staffordshire ST5 5BG), AG(Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast BT7 1NN), AH(Observatoire de Genève, Université de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland), AI(Isaac Newton Group of Telescopes, Apartado de Correos 321, E-38700 Santa Cruz de la Palma, Tenerife, Spain), AJ(Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 398, Issue 4, pp. 1827-1834. (MNRAS Homepage)
Publication Date:
10/2009
Origin:
MNRAS
Astronomy Keywords:
techniques: photometric , planetary systems
DOI:
10.1111/j.1365-2966.2009.15262.x
Bibliographic Code:
2009MNRAS.398.1827S

Abstract

We present results from a search for additional transiting planets in 24 systems already known to contain a transiting planet. We model the transits due to the known planet in each system and subtract these models from light curves obtained with the SuperWASP (Wide Angle Search for Planets) survey instruments. These residual light curves are then searched for evidence of additional periodic transit events. Although we do not find any evidence for additional planets in any of the planetary systems studied, we are able to characterize our ability to find such planets by means of Monte Carlo simulations. Artificially generated transit signals corresponding to planets with a range of sizes and orbital periods were injected into the SuperWASP photometry and the resulting light curves searched for planets. As a result, the detection efficiency as a function of both the radius and orbital period of any second planet is calculated. We determine that there is a good (>50 per cent) chance of detecting additional, Saturn-sized planets in P ~ 10 d orbits around planet-hosting stars that have several seasons of SuperWASP photometry. Additionally, we confirm previous evidence of the rotational stellar variability of WASP-10, and refine the period of rotation. We find that the period of the rotation is 11.91 +/- 0.05 d, and the false alarm probability for this period is extremely low (~10-13).
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