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Shown at left is the measurement we actually made. The horizontal axis
represents the phase of the orbit (that is, the planet makes a single
orbit about the star as the phase goes from 0 to 1). At five times
during the course of a single orbital period, we measured the brightness
of the star+planet system. The points and associated error bars show how
the brightness varied, relative to the value measured at the first epoch.
The solid line then shows the expected variation if the planet reradiates
the absorbed energy from a hotspot as it goes around the star. This model
is strongly constrained by the radial velocity measurements and the only
parameter to be determined is the overall amplitude. Therefore, the agreement is
very encouraging.
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