Larger and faster: revised properties and a shorter orbital period for the WASP-57 planetary system from a pro-am collaboration

  title={Larger and faster: revised properties and a shorter orbital period for the WASP-57 planetary system from a pro-am collaboration},
  author={John Southworth and Luigi Mancini and Jeremy Tregloan-Reed and Sebastiano Calchi Novati and Simona Ciceri and Giuseppe D’ago and Laetitia Delrez and Martin Dominik and D. F. Evans and Micha{\"e}l Gillon and Emmanuel Jehin and U. G. J{\o}rgensen and Troels Haugb{\o}lle and Monika Lendl and Claudio Arena and L. Barbieri and Mauro Barbieri and Giorgio Corfini and Claudio Lopresti and Alessandro Marchini and Gennaro Marino and Khalid A. Alsubai and Valerio Bozza and Daniel M. Bramich and R. Figuera Jaimes and Tobias C. Hinse and Th. Henning and M. Hundertmark and Diana Juncher and Heidi Korhonen and Andrius Popovas and Markus Rabus and Sohrab Rahvar and Robert W. Schmidt and Jesper F. Skottfelt and Colin Snodgrass and D. A. Starkey and J. Surdej and O. Wertz},
  journal={Monthly Notices of the Royal Astronomical Society},
Transits in the WASP-57 planetary system have been found to occur half an hour earlier than expected. We present 10 transit light curves from amateur telescopes, on which this discovery was based, 13 transit light curves from professional facilities which confirm and refine this finding, and high-resolution imaging which show no evidence for nearby companions. We use these data to determine a new and precise orbital ephemeris, and measure the physical properties of the system. Our revised… Expand
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