Corner plot for source ID 00439, best fit with a warm absorption model but which shows evidence for Compton-thin absorption when modelled with an absorber power law. The diagonal panels show the marginal posterior probability distribution for each parameter, while the other panels show the conditional probability distribution functions for each pair of parameters. Here, log(nH) is the host galaxy absorber column density (in units of ×10²² cm⁻²), LOGNH is the column density of the warm absorber (cm⁻²), LOGXI is the ionisation of the warm absorber (ergs cm s⁻¹), log(norm) is the power law normalisation, PhoIndex is the photon index of the power law, and norm is the relative renormalisation of the background model with respect to the source model, which is in agreement with 1.