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

Southworth, John; Hinse, T. C.; Burgdorf, M.; Calchi Novati, S.; Dominik, M.; Galianni, P.; Gerner, T.; Giannini, E.; Gu, S.- H.; Hundertmark, M.; Jorgensen, U. G.; Juncher, D.; Kerins, E.; Mancini, L.; Rabus, M.; Ricci, D.; Schafer, 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.; Harpsoe, 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.; Schonebeck, F.; Snodgrass, C.; Street, R. A.; Surdej, J.; Tsapras, Y. and Vilela, C. (2014). High-precision photometry by telescope defocussing - VI. WASP-24, WASP-25 and WASP-26. Monthly Notices of the Royal Astronomical Society, 444(1) pp. 776–789.

DOI (Digital Object Identifier) Link: https://doi.org/10.1093/mnras/stu1492
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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.

Item Type: Journal Item
Copyright Holders: 2014 The Authors
ISSN: 1365-2966
Keywords: fundamental parameters of stars; planetary systems
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Centre for Electronic Imaging (CEI)
Space
Item ID: 43018
Depositing User: Colin Snodgrass
Date Deposited: 19 May 2015 10:49
Last Modified: 07 Dec 2018 10:31
URI: http://oro.open.ac.uk/id/eprint/43018
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