Calculating Cl's at every multipole

lesgourg / class_public

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)

230 stars 285 forks source link

Calculating Cl's at every multipole #266

Open dkhaz opened 5 years ago

dkhaz commented 5 years ago

Hello:

Does Class perform interpolation to obtain Cl's between two multipoles for which the Cl's are actually computed using the convolution or for every l, Cl's are obtained upon integration ?

If interpolation is used, then what is the way to avoid that to perform the integration for each l ?

Cheers, Dhiraj

JCGoran commented 5 years ago

I think interpolation is used by default, however it seems you can override this by changing l_logstep (default 1.12) or l_linstep (default 40) in your settings file (or the Python wrapper), more info about them is in the manual.