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.
@article{arxiv.1206.3585,
title = {z'-band Ground-Based Detection of the Secondary Eclipse of WASP-19b},
author = {J. R. Burton and C. A. Watson and S. P. Littlefair and V. S. Dhillon and N. P. Gibson and T. R. Marsh and D. Pollacco},
journal= {arXiv preprint arXiv:1206.3585},
year = {2012}
}
Comments
20 pages, 10 figures. Published in the ApJ Supplement series