The transit light curve project. III. TrES transits of TrES-1

Joshua N. Winn, Matthew J. Holman, Anna Roussanova

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67 Scopus citations


We present z-band photometry of three consecutive transits of the exoplanet TrES-1, with an accuracy of 0.15% and a cadence of 40 s. We improve on estimates of the system parameters, finding in particular that the planetary radius is 1.081 ± 0.029 RJup and the stellar radius is 0.811 ±0.020 R The uncertainties include both the statistical error and the systematic error arising from the uncertainty in the stellar mass. The transit times are determined to within about 15 s and allow us to refine the estimate of the mean orbital period: P = 3.0300737 ± 0.0000026 days. We find no evidence for starspots or other irregularities that have been previously reported.

Original languageEnglish (US)
Pages (from-to)1098-1106
Number of pages9
JournalAstrophysical Journal
Issue number2 I
StatePublished - Mar 10 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Planetary systems
  • Stars: individual (TrES-1)
  • Techniques: photometric


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