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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 LSP (values below) suggests the presence of another unseen (non-transiting) exoplanet in this system.


KOI-3448.01, P = 32.51 days [Plot error bars = ± 14.25 min.]
TTV_minimum: 85.81 ± 39.79 days, Amp_ttv_minimum: -40.44 ± 9.74 min.
TTV_maximum: 351.25 ± 43.44 days, Amp_ttv_maximum: 37.75 ± 9.74 min.
TTV_minimum: 616.68 ± 50.58 days, Amp_ttv_minimum: -40.44 ± 9.74 min.
TTV_maximum: 882.12 ± 59.99 days, Amp_ttv_maximum: 37.75 ± 9.74 min.
TTV_minimum: 1147.55 ± 70.76 days, Amp_ttv_minimum: -40.44 ± 9.74 min.
TTV_maximum: 1412.99 ± 82.36 days, Amp_ttv_maximum: 37.75 ± 9.74 min.
P_ttv: 530.87 ± 27.14 days.
Amp_ttv: 78.19 ± 13.78 minutes.
Lomb-Scargle periodogram, candidate P_ttv: 533.22 days; Power: 7.82; P-value: 0.00126.
Linear ephemeris (this work): Tc = 32.51072510(Tc#) + 69.62666033


26 Oct 2013
Kepler KOI-3448.01 (KIC-3348216) 2-(or more?)-Planet System