High-precision photometry by telescope defocussing - VI. WASP-24, WASP-25 and WASP-26
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We present time series photometric observations of 13 transits in the planetary systems WASP-24, WASP-25 and WASP-26. All three systems have orbital obliquity measurements, WASP-24 and WASP-26 have been observed with Spitzer, and WASP-25 was previously comparatively neglected. Our light curves were obtained using the telescope-defocussing method and have scatters of 0.5–1.2 mmag relative to their best-fitting geometric models. We use these data to measure the physical properties and orbital ephemerides of the systems to high precision, finding that our improved measurements are in good agreement with previous studies. High-resolution Lucky Imaging observations of all three targets show no evidence for faint stars close enough to contaminate our photometry. We confirm the eclipsing nature of the star closest to WASP-24 and present the detection of a detached eclipsing binary within 4.25 arcmin of WASP-26.
Southworth , J , Hinse , T C , Burgdorf , M , Calchi Novati , S , Dominik , M , Galianni , P , Gerner , T , Giannini , E , Gu , S-H , Hundertmark , M , Jørgensen , U G , Juncher , D , Kerins , E , Mancini , L , Rabus , M , Ricci , D , Schäfer , S , Skottfelt , J , Tregloan-Reed , J , Wang , X-B , Wertz , O , Alsubai , K A , Andersen , J M , Bozza , V , Bramich , D M , Browne , P , Ciceri , S , D'Ago , G , Damerdji , Y , Diehl , C , Dodds , P , Elyiv , A , Fang , X-S , Finet , F , Figuera Jaimes , R , Hardis , S , Harpsøe , K , Jessen-Hansen , J , Kains , N , Kjeldsen , H , Korhonen , H , Liebig , C , Lund , M N , Lundkvist , M , Mathiasen , M , Penny , M T , Popovas , A , Prof. , S , Rahvar , S , Sahu , K , Scarpetta , G , Schmidt , R W , Schönebeck , F , Snodgrass , C , Street , R A , Surdej , J , Tsapras , Y & Vilela , C 2014 , ' High-precision photometry by telescope defocussing - VI. WASP-24, WASP-25 and WASP-26 ' Monthly Notices of the Royal Astronomical Society , vol 444 , no. 1 , pp. 776-789 . DOI: 10.1093/mnras/stu1492
Monthly Notices of the Royal Astronomical Society
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
DescriptionThe research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013/) under grant agreement nos. 229517 and 268421. This publication was supported by grants NPRP 09-476-1-078 and NPRP X-019-1-006 from Qatar National Research Fund (a member of Qatar Foundation). TCH acknowledges financial support from the Korea Research Council for Fundamental Science and Technology (KRCF) through the Young Research Scientist Fellowship Programme and is supported by the KASI (Korea Astronomy and Space Science Institute) grant 2012-1-410-02/2013-9-400-00. SG, XW and XF acknowledge the support from NSFC under the grant no. 10873031. The research is supported by the ASTERISK project (ASTERoseismic Investigations with SONG and Kepler) funded by the European Research Council (grant agreement no. 267864). DR, YD, AE, FF (ARC), OW (FNRS research fellow) and J Surdej acknowledge support from the Communauté française de Belgique – Actions de recherche concertées – Académie Wallonie-Europe.
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