High-precision photometry by telescope defocussing - VI. WASP-24, WASP-25 andWASP-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, Khalid Al-Subai, 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

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32 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 andWASP-26 have been observed with Spitzer, andWASP-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
Number of pages14
JournalMonthly Notices of the Royal Astronomical Society
Volume444
Issue number1
DOIs
Publication statusPublished - 26 Jul 2014

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Keywords

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

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

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., ... Vilela, C. (2014). High-precision photometry by telescope defocussing - VI. WASP-24, WASP-25 andWASP-26*. Monthly Notices of the Royal Astronomical Society, 444(1), 776-789. https://doi.org/10.1093/mnras/stu1492