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z'-band Ground-Based Detection of the Secondary Eclipse of WASP-19b

We present the ground-based detection of the secondary eclipse of the transiting exoplanet WASP-19b. The observations were made in the Sloan z'-band using the ULTRACAM triple-beam CCD camera mounted on the NTT. The measurement shows a 0.088\pm0.019% eclipse depth, matching previous predictions based on H- and K-band measurements. We discuss in detail our approach to the removal of errors arising due to systematics in the data set, in addition to fitting a model transit to our data. This fit returns an eclipse centre, T0, of 2455578.7676 HJD, consistent with a circular orbit. Our measurement of the secondary eclipse depth is also compared to model atmospheres of WASP-19b, and is found to be consistent with previous measurements at longer wavelengths for the model atmospheres we investigated.

preprint2012arXivOpen access
J. R. BurtonC. A. WatsonS. P. LittlefairV. S. DhillonN. P. GibsonT. R. MarshD. Pollacco
astro-ph.EPastro-ph.SR
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J. R. BurtonC. A. WatsonS. P. LittlefairV. S. DhillonN. P. GibsonT. R. MarshD. Pollacco

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