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DETECTION OF AN EXTRASOLAR PLANET ATMOSPHERE1
ASTROPHYSICAL JOURNAL, no. 1 (2002): 377-384
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We report high-precision spectrophotometric observations of four planetary transits of HD 209458, in the region of the sodium resonance doublet at 589.3 nm. We find that the photometric dimming during transit in a bandpass centered on the sodium feature is deeper by (2.32 +/- 0.57) x 10(-4) relative to simultaneous observations of the tra...更多
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