Orateur
Julien Lesgourgues
(EPFL)
Description
CLASS offers a powerful framework to compute cross-correlation C_l spectra. I will review what is already implemented. Also, to give a feeling of how one should proceed to implement more cross-correlations, I will review the general structure leading to the calculation of all C_l's. I will also mention how the Limber approximation is implemented inside CLASS. Finally, I will mention how the python user of the classy interface may extract from CLASS either directly the C_l’s, or the building blocks allowing to build one own’s Limber-approximated spectrum.
