Sroll2 likelihood in clik format To use it in CosmoMC: - download it in the Planck data directory inside clik_14.0/low_l/simall/ wget https://web.fe.infn.it/~pagano/low_ell_datasets/sroll2/simall_100x143_sroll2_v3_EE_Aplanck.tgz - unpack with tar xzvf simall_100x143_sroll2_v3_EE_Aplanck.tgz - inside CosmoMC/batch3 create a file named simall_sroll2v3_EE.ini filled with #clik likelihood file use_clik = T clik_params_simall = %DATASETDIR%planck_calib.paramnames clik_speed_simall = 0 clik_data_simall = %DATASETDIR%clik_14.0/low_l/simall/simall_100x143_sroll2_v3_EE_Aplanck.clik - now in your CosmoMC parameter file add DEFAULT(batch3/simall_sroll2v3_EE.ini) For Cobaya: - download and install the necessary files cobaya-install planck_2018_lowl.EE_sroll2 -p path-to-cobaya-packages - use the likelihood in your run by adding in the yaml file planck_2018_lowl.EE_sroll2: null