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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 and corresponding Lomb-Scargle periodicity for KOI-3042.01 (727.67 and 725.90 days, respectively) suggest the presence of another unseen (non-transiting) exoplanet in this system.


1st: KOI-3042.01, P = 31.03 days [Plot error bars = ± 17.05 min.]
TTV_maximum: 123.30 ± 79.58 days, Amp_ttv_maximum: 53.11 ± 16.40 min.
TTV_minimum: 487.13 ± 89.34 days, Amp_ttv_minimum: -43.10 ± 16.40 min.
TTV_maximum: 850.97 ± 107.68 days, Amp_ttv_maximum: 53.11 ± 16.40 min.
TTV_minimum: 1214.80 ± 131.05 days, Amp_ttv_minimum: -43.10 ± 16.40 min.
P_ttv: 727.67 �� 62.69 days.
Amp_ttv: 96.21 ± 23.20 minutes.
Lomb-Scargle periodogram, candidate P_ttv: 725.90 days; Power: 5.40; P-value: 0.0477.
Linear ephemeris (this work): Tc = 31.02625729(Tc#) + 91.55024510


26 Oct 2013
Kepler KOI-3042.01 (KIC-8695311) 2-(or more?)-Planet System