Public repository of the Cosmic Linear Anisotropy Solving System (master for the most recent version of the standard code; GW_CLASS to include Cosmic Gravitational Wave Background anisotropies; classnet branch for acceleration with neutral networks; ExoCLASS branch for exotic energy injection; class_matter branch for FFTlog)
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more precise explanation of convergence power spectrum #445
Slightly modifies the explanatory text on how to obtain the convergence angular power spectrum. The shear angular power spectrum has factors of (l+2)!/(l-2)! as previously stated for both convergence and shear, but the convergence should have factor of l^2 (l+1)^2.
(Deflection is d = ð phi, shear is ðð phi/2, but convergence is ð̅ð phi/2 as necessary to get back to spin 0. The modes are hence kappa_lm = - 1/2 l (l+1) phi_lm and the Cls as indicated.)
Slightly modifies the explanatory text on how to obtain the convergence angular power spectrum. The shear angular power spectrum has factors of
(l+2)!/(l-2)!as previously stated for both convergence and shear, but the convergence should have factor ofl^2 (l+1)^2.(Deflection is
d = ð phi, shear isðð phi/2, but convergence isð̅ð phi/2as necessary to get back to spin 0. The modes are hencekappa_lm = - 1/2 l (l+1) phi_lmand the Cls as indicated.)