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Weak gravitational lensing bispectrum in COSMOS

Joel BERGÉ
(Jet Propulsion Laboratory)

The weak lensing bispectrum, the Fourier transform of the three-point correlation function, is the lowest statistics sensitive to the non-Gaussian features of the data. It is thus complementary to the power spectrum. However, measuring it is challenging, not only because it is intrinsically noisy, but also because it requires a big amount of computing power. Thanks to a newly developed method, we are now able to measure it in a very efficient way. I will show preliminary results obtained from the measurement of the weak lensing bispectrum in the COSMOS data.


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