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Published January 10, 2012 | Published
Journal Article Open

Ground-based Detections of Thermal Emission from CoRoT-1b and WASP-12b


We report a new detection of the H-band thermal emission of CoRoT-1b and two confirmation detections of the Ks-band thermal emission of WASP-12b at secondary eclipses. The H-band measurement of CoRoT-1b shows an eclipse depth of 0.145% ± 0.049% with a 3σ percentile between 0.033% and 0.235%. This depth is consistent with the previous conclusions that the planet has an isothermal region with inefficient heat transport from day side to night side, and has a dayside thermal inversion layer at high altitude. The two Ks-band detections of WASP-12b show a joint eclipse depth of 0.299% ± 0.065%. This result agrees with the measurement of Croll & collaborators, providing independent confirmation of their measurement. The repeatability of the WASP-12b measurements also validates our data analysis method. Our measurements, in addition to a number of previous results made with other telescopes, demonstrate that ground-based observations are becoming widely available for characterization of atmospheres of hot Jupiters.

Additional Information

© 2012 The American Astronomical Society. Received 2011 May 25; accepted 2011 September 23; published 2011 December 20. We thank the anonymous referee for valuable comments and suggestions for the paper. We thank John Tolbin, Zhaohuan Zhu, and the Palomar supporting staff for their help with the observations. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. M.Z. is supported by the NASA Postdoctoral Program at JPL. T.B. acknowledges support from NASA Origins grants to Lowell Observatory and support from the NASA High-End Computing Program through the NASA Advanced Supercomputing Division. S.H. is supported by NASA's Sagan Fellowship at California Institute of Technology. TIFKAM was funded by OSU and the MDM consortium, and NSF grant AST-9605012. The Palomar Hale Telescope is operated by Caltech, JPL, and the Cornell University. Facilities: Hale, Hiltner

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