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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-6563.01, P = 20.28 days [Plot avg. error bars = ± 13.26 min.]
TTV_minimum: 172.95 ± 17.90 days, Amp_ttv_minimum: -38.10 ± 10.92 min.
TTV_maximum: 277.07 ± 18.50 days, Amp_ttv_maximum: 35.07 ± 10.92 min.
TTV_minimum: 381.19 ± 19.35 days, Amp_ttv_minimum: -38.10 ± 10.92 min.
TTV_maximum: 485.30 ± 20.41 days, Amp_ttv_maximum: 35.07 ± 10.92 min.
TTV_minimum: 589.42 ± 21.66 days, Amp_ttv_minimum: -38.10 ± 10.92 min.
TTV_maximum: 693.54 ± 23.06 days, Amp_ttv_maximum: 35.07 ± 10.92 min.
TTV_minimum: 797.66 ± 24.58 days, Amp_ttv_minimum: -38.10 ± 10.92 min.
TTV_maximum: 901.78 ± 26.21 days, Amp_ttv_maximum: 35.07 ± 10.92 min.
TTV_minimum: 1005.90 ± 27.93 days, Amp_ttv_minimum: -38.10 ± 10.92 min.
TTV_maximum: 1110.02 ± 29.72 days, Amp_ttv_maximum: 35.07 ± 10.92 min.
TTV_minimum: 1214.13 ± 31.57 days, Amp_ttv_minimum: -38.10 ± 10.92 min.
TTV_maximum: 1318.25 ± 33.46 days, Amp_ttv_maximum: 35.07 ± 10.92 min.
P_ttv: 208.24 ± 4.51 days.
Amp_ttv: 73.17 ± 15.44 minutes.
Lomb-Scargle periodogram, candidate P_ttv: 208.92 days; Power: 6.20; FAP: 0.00288.
Linear ephemeris (this work): Tc = [20.28316344 ± 0.00028206](Tc#) + [70.04193318 ± 0.01000922]


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

21 May 2015
                 Kepler KOI-6563 (KIC-5308778) 2-(or more?)-Planet System

Discussion:
A sinusoidal curve-fit of the [(O-C) vs. Time] data for KOI-6563.01 showed (Figure below) a periodicity (P_ttv) of 208.24 ± 4.51 days; a Lomb-Scargle Periodogram (LSP) of the same data gave a medium-credibility periodicity of 208.92 days.  Potentially, one other non-transiting planet is gravitationally interacting with KOI-6563.01 in this stellar system.