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KOI's (Blue)  or
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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-3620.01, P = 46.70 days [Plot avg. error bars = ± 0.42 min.]
TTV_minimum: 149.07 ± 52.16 days, Amp_ttv_minimum: -0.38 ± 0.15 min.
TTV_maximum: 363.58 ± 55.36 days, Amp_ttv_maximum: 0.36 ± 0.15 min.
TTV_minimum: 578.08 ± 60.81 days, Amp_ttv_minimum: -0.38 ± 0.15 min.
TTV_maximum: 792.59 ± 67.96 days, Amp_ttv_maximum: 0.36 ± 0.15 min.
TTV_minimum: 1007.09 ± 76.34 days, Amp_ttv_minimum: -0.38 ± 0.15 min.
TTV_maximum: 1221.60 ± 85.59 days, Amp_ttv_maximum: 0.36 ± 0.15 min.
TTV_minimum: 1436.10 ± 95.45 days, Amp_ttv_minimum: -0.38 ± 0.15 min.
P_ttv: 429.01 ± 24.01 days.
Amp_ttv: 0.74 ± 0.22 minutes.
Lomb-Scargle periodogram, periodicity (P_ttv): 425.70 days; Power: 3.47; FAP: 0.205.
Linear ephemeris (this work): Tc = [46.69819758 ± 0.00000817](Tc#) + [100.69944960 ± 0.00013901]


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

3 Dec 2014
             Kepler KOI-3620 (KIC-11499263) 2(?)-(or more?)-Planet System

TTV Evidence:
The presence of both a credible periodicity in the Lomb-Scargle Periodogram (LSP) and a corresponding pronounced one (P_ttv) in a sinusoidal distribution of [(O-C) vs. Time] ("TTVxy") data points is strongly suggestive of the presence of a second (possibly unseen, non-transiting) gravitationally-perturbing planetary object in a system.  This is the case for KOI-3620.01.