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TASTE. II. A new observational study of transit time variations in HAT-P-13b

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arxiv 1105.4603 v2 pith:KXALKIJK submitted 2011-05-23 astro-ph.EP astro-ph.IM

V. Nascimbeni , G. Piotto , L. R. Bedin , M. Damasso , L. Malavolta , L. Borsato This is my paper
classification astro-ph.EPastro-ph.IM
keywords transitexoplanetshat-p-13bperturbertastetimevariationsasiago
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abstract

TASTE (The Asiago Search for Transit timing variations of Exoplanets) project is collecting high-precision, short-cadence light curves for a selected sample of transiting exoplanets. It has been claimed that the hot jupiter HAT-P-13b suddenly deviated from a linear ephemeris by $\sim 20$ min, implying that there is a perturber in the system. Using five new transits, we discuss the plausibility of this transit time variation (TTV), and show that a periodic signal should not be excluded. More follow-up observations are required to constrain the mass and the orbit of the hypothetical perturber.

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