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Exoplanet-Science.com

TTVs are derived from Q1-Q16 Kepler data.  x-axes: “Observed Tc” (Mid-Transit Time): EXOFAST’s best-fits from Kepler light flux vs. time data.  y-axes: “(O – C)”: difference between Observed Tc and the Calculated Tc from the graphically obtained linear ephemeris.  The plots are pictured in the order of orbital periods.

Discussion:
The observed sinusoidal TTV (P_ttv = 822.03 days) suggests the presence of another unseen (non-transiting) exoplanet in this system.  This is strongly supported by the Lomb-Scargle Periodogram periodicity of 823.01 days for the TTV-xy data.


1st: KOI-3069.01, P = 43.10 days [Plot error bars = ± 15.75 min.]
TTV_minimum: 472.66 ± 97.86 days, Amp_ttv_minimum: -28.24 ± 11.18 min.
TTV_maximum: 883.67 ± 123.43 days, Amp_ttv_maximum: 34.19 ± 11.18 min.
TTV_minimum: 1294.69 ± 155.96 days, Amp_ttv_minimum: -28.24 ± 11.18 min.
P_ttv: 822.03 ± 82.83 days.
Amp_ttv: 62.44 ± 15.81 minutes.
Lomb-Scargle periodogram, candidate P_ttv: 823.01 days; Power: 4.46; P-value: 0.0832.
Linear ephemeris (this work): Tc = 43.10333180(Tc#) + 73.11916284


26 Oct 2013
Kepler KOI-3069.01 (KIC-4676964) 2-(or more?)-Planet System