Analytic approximations for transit light curve observables, uncertainties, and covariances
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Winn_Analytic Approximations.PDF
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Author(s)
Carter, Joshua Adam
Yee, Jennifer C.
Eastman, Jason
Gaudi, B. Scott
Winn, Joshua Nathan
Date Issued
February 2009
Journal
Proceedings of the International Astronomical Union
Publisher
Cambridge University Press
Citation
Carter, Joshua A. et al. “Analytic approximations for transit light curve observables and uncertainties.” Proceedings of the International Astronomical Union 4.Symposium S253 (2008): 392-393.
Version
Author's final manuscript
Abstract
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 non-analytic 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 formulas, for the case of an exoplanet transiting a star with a uniform brightness distribution. When limb darkening is significant, our parameter sets are still useful, although our analytic formulas underpredict the covariances and uncertainties.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
http://dx.doi.org/10.1017/S1743921308026732
