### CAMB-- Power spectrum factorization

Posted:

**March 20 2021**Hello everybody,

I've a question regarding the factorization that CAMB use when is calculating the angular power spectrum (Cl).

What is the correct factorization with these "counts" set to "True"?

pars.SourceTerms.counts_density = True

pars.SourceTerms.counts_redshift = True

pars.SourceTerms.counts_lensing = True

For instance I know that the correct factorization for the case:

pars.SourceTerms.counts_density = True

pars.SourceTerms.counts_redshift = True

pars.SourceTerms.counts_lensing = False

is: Cl_CAMB[i,j]= (bi*bj)*(Cl_bb[i,j]) + (fi*fj)*(Cl_ff[i,j]) + (bi*fj + bj*fi)*(Cl_bf[i,j])

Thanks in advance.

I've a question regarding the factorization that CAMB use when is calculating the angular power spectrum (Cl).

What is the correct factorization with these "counts" set to "True"?

pars.SourceTerms.counts_density = True

pars.SourceTerms.counts_redshift = True

pars.SourceTerms.counts_lensing = True

For instance I know that the correct factorization for the case:

pars.SourceTerms.counts_density = True

pars.SourceTerms.counts_redshift = True

pars.SourceTerms.counts_lensing = False

is: Cl_CAMB[i,j]= (bi*bj)*(Cl_bb[i,j]) + (fi*fj)*(Cl_ff[i,j]) + (bi*fj + bj*fi)*(Cl_bf[i,j])

Thanks in advance.