We derive the first secondary eclipse map of an exoplanet, HD 189733b, basedon Spitzer IRAC 8 micron data. We develop two complementary techniques forderiving the two dimensional planet intensity: regularized slice mapping andspherical harmonic mapping. Both techniques give similar derived intensity mapsfor the infrared day-side flux of the planet, while the spherical harmonicmethod can be extended to include phase variation data which better constrainthe map. The longitudinal offset of the day-side hot spot is consistent withthat found in prior studies, strengthening the claim of super-rotating winds,and eliminating the possibility of phase variations being caused by stellarvariability. The latitude of the hot-spot is within 10.1 deg (68% confidence)of the planet's equator, confirming the predictions of general circulationmodels for hot Jupiters and indicative of a small planet obliquity.
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