1301.5499 (Tsevi Mazeh et al.)

Transit Timing Observations from Kepler. VIII Catalog of Transit Timing Measurements of the First Twelve Quarters    [PDF]

Tsevi Mazeh, Gil Nachmani, Tomer Holczer, Daniel C. Fabrycky, Eric B. Ford, Roberto Sanchis-Ojeda, Gil Sokol, Jason F. Rowe, Eric Agol, Joshua A. Carter, Jack J. Lissauer, Elisa V. Quintana, Darin Ragozzine, Jason H. Steffen, William Welsh

Following Ford (2011, 2012) and Steffen (2012) we derived transit timing variations (TTVs) of the Kepler KOIs, using the first twelve quarters of the Kepler data. Simultaneously with its timing, we obtained for each transit its duration and depth, presenting the results as a catalog for the community to use. We derived a few statistics of our TTVs that could be used to indicate significant variations. Including systems found by previous works, we pointed out 100 KOIs that showed highly significant TTV, 9 of which had short-period TTV modulations with small amplitudes. We considered two effects that could cause apparent periodic TTV - the finite sampling of the observations and the interference with the stellar activity, stellar spots in particular. We briefly discuss some statistical aspects of our detected TTVs. We show that the TTV period is correlated with the orbital period of the planet and the TTV amplitude.

View original: http://arxiv.org/abs/1301.5499