The Transit Light Curve Project. VIII. Six Occultations of the Exoplanet TrES-3

Details The Transit Light Curve Project. VIII. Six Occultations of the Exoplanet TrES-3 The Transit Light Curve Project. VIII. Six Occultations of the Exoplanet TrES-3

2008-04-15

arxiv.org/abs/0804.2479v1

Astronomy and Astrophysics

Astrophysics

To appear in AJ [14 pages]

Scientific paper

10.1088/0004-6256/136/1/267

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 0.00024, 0.0005, and 0.00086 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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