A1 Refereed original research article in a scientific journal
High-precision photometry by telescope defocussing - VI – WASP-24, WASP-25 and WASP-26
Subtitle: WASP-24, WASP-25 and WASP-26
Authors: Southworth John, 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.
Publisher: Oxford University Press
Publishing place: Oxford
Publication year: 2014
Journal: Monthly Notices of the Royal Astronomical Society
Journal acronym: MNRAS
Volume: 444
Issue: 1
First page : 776
Last page: 789
Number of pages: 14
ISSN: 0035-8711
eISSN: 1365-2966
DOI: https://doi.org/10.1093/mnras/stu1492
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.
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