Kepler KOI-734 (KIC-10272442) 2-(or more?)-Planet System

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Data are from Q1-Q15 (for 734.01) and Q1-Q16 (for 734.02).  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 (smallest first).

Discussion: The TTV of 734.02 (Amp_ttv: ± ~ 80 minutes) suggests the presence of another unseen (non-transiting) planet in the system.

1st: KOI-734.01, P = 24.54 days
P_ttv: unknown.
Lomb-Scargle Periodogram: numerous peaks of similar size.
Linear ephemeris (this work, Q1-Q15): Tc = 24.54362748(Tc#) + 120.91939399.

2nd: KOI-734.02, P = 70.28 days
Average sigma_Tc: 11.03 min.
TTV_minimum:   440.22 ± 72.06 days, Amp_ttv_minimum:  -70.78 ± 24.53 min.
TTV_maximum:  887.25 ± 92.11 days, Amp_ttv_maximum:  87.83 ± 24.53 min.
TTV_minimum:   1334.28 ± 118.29 days, Amp_ttv_minimum:  -70.78 ± 24.53 min.
P_ttv: 894.05 ± 66.58 days.
Amp_ttv: 158.61 ± 34.69 minutes.
Lomb-Scargle periodogram, candidate P_ttv: 876.62 days; Power: 4.36; P-value: 0.0446.
Linear ephemeris (this work, Q1-Q16): Tc = 70.27792312(Tc#) + 84.33884786

Reference:• For Q1-Q6 TTV data of 734.01 (thru ~ 563 (BJD-2454900) days), see: Ford2012arXiv-1201.1892.

20 July 2013; updated 9 Aug 2013