Exoplanet-Science.com

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-3407.01, P = 92.44 days [Plot avg. error bars = ± 9.01 min.]
TTV_maximum: 287.49 ± 47.32 days, Amp_ttv_maximum: 28.86 ± 7.44 min.
TTV_minimum: 511.54 ± 52.01 days, Amp_ttv_minimum: -26.22 ± 7.44 min.
TTV_maximum: 735.58 ± 58.59 days, Amp_ttv_maximum: 28.86 ± 7.44 min.
TTV_minimum: 959.62 ± 66.49 days, Amp_ttv_minimum: -26.22 ± 7.44 min.
TTV_maximum: 1183.66 ± 75.31 days, Amp_ttv_maximum: 28.86 ± 7.44 min.
P_ttv: 448.08 ± 22.86 days.
Amp_ttv: 55.08 ± 10.52 minutes.
Lomb-Scargle periodogram, candidate P_ttv: 446.40 days; Power: 4.44; FAP: 0.00891.
Linear ephemeris (this work): Tc = [92.43799690 ± 0.00119124](Tc#) + [96.57221282 ± 0.01013802]


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

15 April 2015
                 Kepler KOI-3407 (KIC-7131760) 2-(or more?)-Planet System

Discussion:
In the example of KOI-3407.01, a sinusoidal curve-fit of the (O-C) vs. Time data showed (Figure below) a periodicity (P_ttv) of 448.08 ± 22.86 days; 446.40 days was observed in the Lomb-Scargle Periodogram (LSP) of the same data.

Scroll Down  to

KOI's (Blue)  or
K2 Objects (Green)