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

Plot: KOI-303.01, P = 60.93 days [Plot error bars = ± 1.96 min.]
TTV_minimum: 173.43 ± 61.79 days, Amp_ttv_minimum: -3.96 ± 1.76 min.
TTV_maximum: 445.71 ± 67.06 days, Amp_ttv_maximum: 4.98 ± 1.76 min.
TTV_minimum: 718.00 ± 75.99 days, Amp_ttv_minimum: -3.96 ± 1.76 min.
TTV_maximum: 990.28 ± 87.45 days, Amp_ttv_maximum: 4.98 ± 1.76 min.
TTV_minimum: 1262.56 ± 100.59 days, Amp_ttv_minimum: -3.96 ± 1.76 min.
P_ttv: 544.56 ± 34.56 days.
Amp_ttv: 8.94 ± 2.49 minutes.
Lomb-Scargle periodogram, candidate P_ttv: 545.49 days; Power: 3.55; P-value: 0.189.
Linear ephemeris (this work): Tc = 60.92833545(Tc#) + 106.37206939

References:
• For Q0-Q6 TTV data of 303.01 (thru ~ 563 (BJD-2454900) days), see: Ford et al., 2012, arXiv-1201.1892.
• For Q0-12 TTV data of 303.01 (thru ~ 1116 (BJD-2454900) days), see: Mazeh et al., 2013, arXiv-1301.5499.

11 Nov 2013
Kepler KOI-303 (KIC-5966322) 2-(or more?)-Planet System