Using a new Gauss-Legendre quadrature transit model and 800 injection-retrieval tests, the authors find Saturn-like oblateness is detectable at 3sigma in favorable cases, while planets flatter than Jupiter are not reliably retrieved at any tested noise level.
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Prospects of detecting rotational flatness of exoplanets from space-based photometry
Using a new Gauss-Legendre quadrature transit model and 800 injection-retrieval tests, the authors find Saturn-like oblateness is detectable at 3sigma in favorable cases, while planets flatter than Jupiter are not reliably retrieved at any tested noise level.