Journal
ASTROPHYSICAL JOURNAL
Volume 689, Issue 1, Pages 499-512Publisher
IOP PUBLISHING LTD
DOI: 10.1086/592321
Keywords
binaries: eclipsing; methods: analytical; planets and satellites: general
Categories
Funding
- William S. Edgerly Innovation Fund
- NASA [HST-GO-11165, NAS5-26555]
- Space Telescope Science Institute
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The light curve of an exoplanetary transit can be used to estimate the planetary radius and other parameters of interest. Because accurate parameter estimation is a nonanalytic and computationally intensive problem, it is often useful to have analytic approximations for the parameters as well as their uncertainties and covariances. Here, we give such formulae, for the case of an exoplanet transiting a star with a uniform brightness distribution. We also assess the advantages of some relatively uncorrelated parameter sets for fitting actual data. When limb darkening is significant, our parameter sets are still useful, although our analytic formulae underpredict the covariances and uncertainties.
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