• DOI:10.1086/508155
• Corpus ID: 15533478

The Transit Light Curve Project. I. Four Consecutive Transits of the Exoplanet XO-1b

@article{Holman2006TheTL,
  title={The Transit Light Curve Project. I. Four Consecutive Transits of the Exoplanet XO-1b},
  author={Matthew J. Holman and Joshua N. Winn and David W. Latham and Francis T. O'Donovan and David Charbonneau and G{\'a}sp{\'a}r {\'A}. Bakos and Gilbert A. Esquerdo and Carl W. Hergenrother and Mark E. Everett and Andr{\'a}s P{\'a}l},
  journal={The Astrophysical Journal},
  year={2006},
  volume={652},
  pages={1715 - 1723}
}

• M. Holman, J. Winn, +7 authors A. Pál
• Published 25 July 2006
• Geology, Physics
• The Astrophysical Journal

We present RIz photometry of four consecutive transits of the newly discovered exoplanet XO-1b. We improve on the estimates of the transit parameters, finding the planetary radius to be RP = 1.184RJ, and the stellar radius to be R⋆ = 0.928 R☉, assuming a stellar mass of M⋆ = (1.00 ± 0.03) M☉. The uncertainties in the planetary and stellar radii are dominated by the uncertainty in the stellar mass. These uncertainties increase by a factor of 2-3 if a more conservative uncertainty of 0.10 M☉ is assumed for the stellar mass. Our estimate of the planetary radius is smaller than that reported by McCullough and coworkers, and the resulting estimate for the mean density of XO-1b is intermediate between that of the low-density planet HD 209458b and the higher density planets TrES-1 and HD 189733b. The timings of the transits have an accuracy ranging from 0.2 to 2.5 minutes and are marginally consistent with a uniform period.