High-precision photometry by telescope defocussing - VI. WASP-24, WASP-25 and WASP-26

John Southworth, T. C. Hinse, M. Burgdorf, S. Calchi Novati, M. Dominik, P. Galianni, T. Gerner, E. Giannini, S.-H. Gu, M. Hundertmark, U. G. Jørgensen, D. Juncher, E. Kerins, L. Mancini, M. Rabus, D. Ricci, S. Schäfer, J. Skottfelt, J. Tregloan-Reed, X.-B. WangO. Wertz, K. A. Alsubai, J. M. Andersen, V. Bozza, D. M. Bramich, P. Browne, S. Ciceri, G. D'Ago, Y. Damerdji, C. Diehl, P. Dodds, A. Elyiv, X.-S. Fang, F. Finet, R. Figuera Jaimes, S. Hardis, K. Harpsøe, J. Jessen-Hansen, N. Kains, H. Kjeldsen, H. Korhonen, C. Liebig, M. N. Lund, M. Lundkvist, M. Mathiasen, M. T. Penny, A. Popovas, S. Prof., S. Rahvar, K. Sahu, G. Scarpetta, R. W. Schmidt, F. Schönebeck, C. Snodgrass, R. A. Street, J. Surdej, Y. Tsapras, C. Vilela

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)776-789
JournalMonthly Notices of the Royal Astronomical Society
Volume444
Issue number1
Early online date20 Aug 2014
DOIs
Publication statusPublished - 11 Oct 2014

Keywords

  • Stars: fundamental parameters
  • Planetary systems
  • Stars: individual: WASP-24
  • Stars: individual: WASP-25
  • Stars: individual: WASP-26

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