This allows us to have mock data without covariance matrix attached, so we don't need to store the same covariance over and over again when dealing with a set of realizations. Instead, the covariance is read from another sacc file (cells_coadded_cov).
This allows us to have mock data without covariance matrix attached, so we don't need to store the same covariance over and over again when dealing with a set of realizations. Instead, the covariance is read from another sacc file (
cells_coadded_cov).