Ultra-high energy cosmic rays: Constraints on the maximum-energy distribution of the sources and the possible role of ultra-fast outflows in active galactic nuclei An open question in the search for ultra-high-energy cosmic-ray (UHECR) sources is whether they are few and prominent or if a large population of sources collectively contributes...

Likelihood-free inference and gamma-ray astronomy Estimating (physical) model parameters θ from experimental data x is one of the core tasks in any field of physics. Statistical estimation procedures frequently make use of the likelihood function p(x|θ). Often, the likelihood can not be evaluated explicitly, but can be efficiently sampled from....