TTVs are derived from Q0-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-834.01, P = 23.65 days [Plot avg. error bars = ± 2.76 min.]
TTV_minimum: 98.19 ± 21.17 days, Amp_ttv_minimum: -4.49 ± 0.93 min.
TTV_maximum: 289.11 ± 22.22 days, Amp_ttv_maximum: 5.24 ± 0.93 min.
TTV_minimum: 480.02 ± 24.17 days, Amp_ttv_minimum: -4.49 ± 0.93 min.
TTV_maximum: 670.93 ± 26.83 days, Amp_ttv_maximum: 5.24 ± 0.93 min.
TTV_minimum: 861.84 ± 30.00 days, Amp_ttv_minimum: -4.49 ± 0.93 min.
TTV_maximum: 1052.75 ± 33.55 days, Amp_ttv_maximum: 5.24 ± 0.93 min.
TTV_minimum: 1243.66 ± 37.36 days, Amp_ttv_minimum: -4.49 ± 0.93 min.
TTV_maximum: 1434.57 ± 41.36 days, Amp_ttv_maximum: 5.24 ± 0.93 min.
P_ttv: 381.82 ± 9.48 days.
Amp_ttv: 9.73 ± 1.32 minutes.
Lomb-Scargle periodogram, periodicity (P_ttv): 382.65 days; Power: 11.69; FAP: 0.00426.
Linear ephemeris (this work): Tc = 23.65367831(Tc#) + 104.37747559

For literature references, including Tc#, Tc, and major TTV tabulations, see my "Summary" webpage.

25 Sep 2014

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KOI-834 (Kepler-238, KIC-5436502) 5-(or more?)-Planets