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NASA Ames Research Center


Article - Kepler 18-b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements

System Parameters for Kepler-18b

System parameters for Kepler-18
a. based on isochrone fits using ρ∗, from MCMC model and Teff and [Fe/H] from spectroscopy.
b. from MOOG analysis
c. from MCMC model
d. from TTV model e derived from other parameters

Light Curve for Kepler-18

Light curve for Kepler-18
Kepler lightcurves for K00137. The upper panel shows the normalized raw Photometric Analysis (PA) lightcurves for quarters 0 through 6. The various discontinuities are due to effects such as spacecraft safe-mode events or loss of fine pointing. Each quarter put the star on a different detector, which accounts for the change in overall sensitivity. The long-term drifts in each quarter are temperature related. The lower panel shows the normalized corrected Pre-search Data Conditioned (PDC) lightcurve. Most of the spacecraft-related variability of the PA lightcurve has been removed.
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