Research overview

• Buchner+17a:
• Population analysis from 700 Swift GRB
• Obscuration is stellar mass dependent
• Probably the host galaxy
• Buchner+17b:
• Reweight with stellar mass function of AGN
• Prediction of AGN obscuration by host galaxies alone (non-nuclear)
• Comparison to cosmological hydro simulations
• Eddington-rate dependent nuclear obscurer model

Galaxy gas as obscurer - I. GRBs x-ray galaxies and find an NH³ ~ M* relation

Galaxy gas as obscurer - II. Separating the galaxy-scale and nuclear obscurers of active galactic nuclei