The Transit Light Curve Project. Viii. Six Occultations of the Exoplanet Tres-3

 
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Winn, Joshua N.
Holman, Matthew J.
Shporer, Avi
Fernández, José
Mazeh, Tsevi
Latham, David W.
Charbonneau, David
Everett, Mark E.
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https://doi.org/10.1088/0004-6256/136/1/267
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Winn, Joshua N., Matthew J. Holman, Avi Shporer, José Fernández, Tsevi Mazeh, David W. Latham, David Charbonneau, and Mark E. Everett. 2008. “THE TRANSIT LIGHT CURVE PROJECT. VIII. SIX OCCULTATIONS OF THE EXOPLANET TrES-3.” The Astronomical Journal 136 (1): 267–71. https://doi.org/10.1088/0004-6256/136/1/267.
Abstract
We present photometry of the exoplanet host star TrES-3 spanning six occultations (secondary eclipses) of its giant planet. No flux decrements were detected, leading to 99%-confidence upper limits on the planet-to-star flux ratio of 2.4 x 10(-4), 5.0 x 10(-4), and 8.6 x 10(-4) in the i-, z-, and R-bands respectively. The corresponding upper limits on the planet's geometric albedo are 0.30, 0.62, and 1.07. The upper limit in the i-band rules out the presence of highly reflective clouds, and is only a factor of 2-3 above the predicted level of thermal radiation from the planet.
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