Multiple planets or exomoons in Kepler hot Jupiter systems with transit timing variations

@article{Szabo2013MultiplePO,
  title={Multiple planets or exomoons in Kepler hot Jupiter systems with transit timing variations},
  author={R'obert Szab'o and Gyula M. Szab'o and Gergely D'alya and Attila E. Simon and Gabriella Hodos'an and L{\'a}szl{\'o} L. Kiss},
  journal={Astronomy and Astrophysics},
  year={2013},
  volume={553}
}
Aims. Hot Jupiters are thought to belong to single-planet systems. Somewhat surprisingly, some hot Jupiters have been reported to exhibit transit timing variations (TTVs). The aim of this paper is to identify the origin of these observations, identify possible periodic biases leading to false TTV detections, and refine the sample to a few candidates with likely dynamical TTVs.Methods. We present TTV frequencies and amplitudes of hot Jupiters in Kepler Q0–6 data with Fourier analysis and a… 

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