\label{fig:n-Pobs-Gammapobs_from_uniform_n-Pact-Gammapact} Density contours \(\log_{10}\ n(\Gamma_{\rm obs}, P_{\rm obs})\) for uniform distributions of \(\Gamma_{\rm act}\)- and \(P_{\rm act}\)-values (colored curves). The orange circles represent the results from a Monte-Carlo simulation.