TTVs are derived from Q1-Q17 Kepler data.  x-axes: “Observed Tc” (Mid-Transit Time): EXOFAST’s best-fits from Normalized PDCSAP_FLUX Kepler light flux vs. time (BJD_tdb - 2454900) data.  y-axes: “(O – C)”: difference between Observed Tc and the Calculated Tc from the graphically obtained linear ephemeris.

Figure: KOI-5417.01, P = 55.25 days [Plot avg. error bars = ± 0.11 min.]
TTV_maximum: 218.17 ± 27.84 days, Amp_ttv_maximum: 0.39 ± 0.13 min.
TTV_minimum: 381.07 ± 29.35 days, Amp_ttv_minimum: -0.45 ± 0.13 min.
TTV_maximum: 543.98 ± 31.54 days, Amp_ttv_maximum: 0.39 ± 0.13 min.
TTV_minimum: 706.88 ± 34.28 days, Amp_ttv_minimum: -0.45 ± 0.13 min.
TTV_maximum: 869.78 ± 37.45 days, Amp_ttv_maximum: 0.39 ± 0.13 min.
TTV_minimum: 1032.69 ± 40.95 days, Amp_ttv_minimum: -0.45 ± 0.13 min.
TTV_maximum: 1195.59 ± 44.71 days, Amp_ttv_maximum: 0.39 ± 0.13 min.
TTV_minimum: 1358.49 ± 48.65 days, Amp_ttv_minimum: -0.45 ± 0.13 min.
P_ttv: 325.81 ± 9.69 days.
Amp_ttv: 0.83 ± 0.18 minutes.
Lomb-Scargle periodogram, candidate P_ttv: 324.70 days; Power: 5.09; FAP: 0.0300.
Linear ephemeris (this work): Tc = [55.24900450 ± 0.00000890](Tc#) + [97.98031189 ± 0.00012836]


Numerous literature and major Tc#, Tc, and TTV tabulation references can be found on my "Summary" webpage following the table.

24 May 2015
                 Kepler KOI-5417 (KIC-7743464) 2-(or more?)-Planet System

Discussion:
A sinusoidal curve-fit of the [(O-C) vs. Time] data for KOI-5417.01 showed (Figure below) a periodicity (P_ttv) of 325.81 ± 9.69 days; a Lomb-Scargle Periodogram (LSP) of the same data gave a medium-credibility periodicity of 324.70 days.  Potentially, one other non-transiting planet is gravitationally interacting with KOI-5417.01 in this stellar system.

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