rxmc.covariance.normalization_term#

rxmc.covariance.normalization_term(magnitude=None, parameter=None, mask=None, log=True, support=None) → Term[source]#

A correlated normalisation systematic outer(eta * ym, eta * ym).

With magnitude it is a fixed fractional normalisation uncertainty; with parameter the magnitude eta is a free nuisance (c = exp(theta) when log). In both cases the mode scales with the model prediction ym.