Class lsst::afw::math::DoubleGaussianFunction2¶
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template<typename
ReturnT>
classDoubleGaussianFunction2: public lsst::afw::math::Function2<ReturnT>¶ double Guassian (sum of two Gaussians)
Intended for use as a PSF model: the main Gaussian represents the core and the second Gaussian represents the wings.
f(x,y) = A (e^(-r^2 / 2 sigma1^2) + ampl2 e^(-r^2 / 2 sigma2^2)) where:
A = 1 / (2 pi (sigma1^2 + ampl2 sigma2^2))
r^2 = x^2 + y^2 coefficients c[0] = sigma1, c[1] = sigma2, c[2] = ampl2