HAT-P-20b–HAT-P-23b: FOUR MASSIVE TRANSITING EXTRASOLAR PLANETS

@article{Bakos2011HATP20bHATP23bFM,
  title={HAT-P-20b–HAT-P-23b: FOUR MASSIVE TRANSITING EXTRASOLAR PLANETS},
  author={G{\'a}sp{\'a}r {\'A}. Bakos and Joel D. Hartman and Guillermo Torres and David W. Latham and G. Kov'acs and Robert W. Noyes and D. A. Fischer and J. A. Johnson and Geoffrey W. Marcy and Andrew W. Howard and David M. Kipping and Gilbert A. Esquerdo and Avi Shporer and Bence B'eky and L. A. Buchhave G. Perumpilly and Mark E. Everett and Dimitar D. Sasselov and Robert P. Stefanik and J'ozsef L'az'ar and Istv{\'a}n Papp and Paolo Padovani Harvard-Smithsonian CfA and Cambridge and Ma and Usa and Nsf Fellow and Konkoly Observatory and Budape{\vs}ť and Hungary. and Astronomy Department and Yale University and New Haven and Ct and Dep. of Physics and Astronomy and San Diego State University and Santos Jose Francisco and Ca and California Institute of Technology. and Department of Theoretical Astrophysics and Pasadena and Department of Physics Astronomy and Uc Berkeley and Berkeley and Ucl and Dept. of Physics and London and UK. and Lcogt and Santa Barbara and Niels Bohr Institute and Copenhagen University and Denmark Hungarian Astronomical Association},
  journal={The Astrophysical Journal},
  year={2011},
  volume={742}
}
We report the discovery of four relatively massive (2–7 MJ) transiting extrasolar planets. HAT-P-20b orbits the moderately bright V = 11.339 K3 dwarf star GSC 1910-00239 on a circular orbit, with a period P = 2.875317  ±  0.000004 days, transit epoch Tc = 2455080.92661  ±  0.00021 (BJDUTC), and transit duration 0.0770  ±  0.0008 days. The host star has a mass of 0.76  ±  0.03 M☉, radius of 0.69  ±  0.02 R☉, effective temperature 4595  ±  80 K, and metallicity [Fe/H] = +0.35  ±  0.08. The… 
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