### CosmoMC gaussian and HL likelihoods

Posted:

**February 03 2022**Hi all,

I am trying to understand how Cl_hat, Fiducial_Cl and covariance matrix are read from the .dataset parameter file in order to run CosmoMC with a CMB gaussian likelihood (either the fiducial gaussian and the HL, namely 'gaussian' and 'HL' in CMBlike.f90)

Does someone actually knows whether such inputs must be provided in the [lmin-lmax] multipole range, or can be given from l=2 up to some l>lmax and then CMBlikes takes care of selecting the correct rows?

Just to be clearer, I am running it in 30<l<600, only T; I have set loin and lmax accordingly in the parameter file, provided the covariance matrix as a text with (lmax-lmin+1)x(lmax-lmin+1) dimension, and given fiducial Cls in 30-600 multipole range.

Thanks to everyone who's going to help me to figure this out! :)

Simone

I am trying to understand how Cl_hat, Fiducial_Cl and covariance matrix are read from the .dataset parameter file in order to run CosmoMC with a CMB gaussian likelihood (either the fiducial gaussian and the HL, namely 'gaussian' and 'HL' in CMBlike.f90)

Does someone actually knows whether such inputs must be provided in the [lmin-lmax] multipole range, or can be given from l=2 up to some l>lmax and then CMBlikes takes care of selecting the correct rows?

Just to be clearer, I am running it in 30<l<600, only T; I have set loin and lmax accordingly in the parameter file, provided the covariance matrix as a text with (lmax-lmin+1)x(lmax-lmin+1) dimension, and given fiducial Cls in 30-600 multipole range.

Thanks to everyone who's going to help me to figure this out! :)

Simone