The TASTE project is searching for low-mass planets with the transit timing variation (TTV) technique by gathering high-precision, short-cadence light curves for a selected sample of transiting exoplanets. It has been claimed that the "hot Jupiter" WASP-3b could be perturbed by a second planet. Presenting eleven new light curves (secured at the IAC80 and UDEM telescopes) and re-analyzing thirty-eight archival light curves in a homogeneous way, we show that new data do not confirm the previously claimed TTV signal. However, we bring evidence that measurements are not consistent with a constant orbital period, though no significant periodicity can be detected. Additional dynamical modeling and follow-up observations are planned to constrain the properties of the perturber or to put upper limits to it. We provide a refined ephemeris for WASP-3b and improved orbital/physical parameters. A contact eclipsing binary, serendipitously discovered among field stars, is reported here for the first time. (2 data files).
|Journal||VizieR On-line Data Catalog: J/A+A/549/A30. Originally published in: 2013A&A...549A..30N|
|Publication status||Published - 1 Feb 2013|
Nascimbeni, V., Cunial, A., Murabito, S., Sada, P. V., Aparicio, A., Piotto, G., Bedin, L. R., Milone, A. P., Rosenberg, A., Zurlo, A., Borsato, L., Damasso, M., Granata, V., & Malavolta, L. (2013). VizieR Online Data Catalog: Light curves of WASP-3b (Nascimbeni+, 2013). VizieR On-line Data Catalog: J/A+A/549/A30. Originally published in: 2013A&A...549A..30N, 354.