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                 Kepler KOI-103 (KIC-2444412) 2-(or more?)-Planet System

Discussion:
A sinusoidal curve-fit of the [(O-C) vs. Time] data for KOI-103.01 showed (Figure below) a periodicity (P_ttv) of 261.61 ± 1.03 days; a Lomb-Scargle Periodogram (LSP) of the same data gave a high-credibility periodicity of 261.14 days.  Potentially, one other non-transiting planet is gravitationally interacting with KOI-103.01 in this stellar system.

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-103.01, P = 14.91 days [Plot avg. error bars = ± 2.10 min. (smaller than symbols)]
TTV_maximum: 67.64 ± 3.52 days, Amp_ttv_maximum: 26.29 ± 1.20 min.
TTV_minimum: 198.44 ± 3.60 days, Amp_ttv_minimum: -25.59 ± 1.20 min.
TTV_maximum: 329.25 ± 3.74 days, Amp_ttv_maximum: 26.29 ± 1.20 min.
TTV_minimum: 460.05 ± 3.95 days, Amp_ttv_minimum: -25.59 ± 1.20 min.
TTV_maximum: 590.86 ± 4.21 days, Amp_ttv_maximum: 26.29 ± 1.20 min.
TTV_minimum: 721.66 ± 4.51 days, Amp_ttv_minimum: -25.59 ± 1.20 min.
TTV_maximum: 852.46 ± 4.85 days, Amp_ttv_maximum: 26.29 ± 1.20 min.
TTV_minimum: 983.27 ± 5.22 days, Amp_ttv_minimum: -25.59 ± 1.20 min.
TTV_maximum: 1114.07 ± 5.61 days, Amp_ttv_maximum: 26.29 ± 1.20 min.
TTV_minimum: 1244.88 ± 6.02 days, Amp_ttv_minimum: -25.59 ± 1.20 min.
TTV_maximum: 1375.68 ± 6.45 days, Amp_ttv_maximum: 26.29 ± 1.20 min.
TTV_minimum: 1506.49 ± 6.88 days, Amp_ttv_minimum: -25.59 ± 1.20 min.
P_ttv: 261.61 ± 1.03 days.
Amp_ttv: 51.89 ± 1.69 minutes.
Lomb-Scargle periodogram, candidate P_ttv: 261.14 days; Power: 40.51; FAP: 0.
Linear ephemeris (this work): Tc = [14.91095193 ± 0.00005097](Tc#) + [74.33735934 ± 0.00283904]


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

30 Jun 2015

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