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Research interests Geometry of obscurer from X-ray spectra Luminosity function Heavily obscured AGN Obscured, CTK fraction f(L,z) Obscured, CTK fraction by galaxy gas f(M*,z) SMBH occupation f(M*,z) Hierarchical Bayesian Models Nested Sampling & PyMultiNest Cosmological Sims Spectral fitting with low counts (BXA) Multi-wavelength Association NWAY Salvato, Buchner, Budavári et al. 2017 H1: chance alignment of unrelated srcs H2: single source Bayes factor Angular separation Positional uncertainties Weighting term (mag, colors,etc) posterior probability for match between X-ray source i & a potential counterpart j depends on counterpart sky number density ρs and expected counterpart fraction ηx