Summary III

• If AGN did not have a nuclear obscurer, 40% of them would still be obscured
• In fact, 3/4 obscured, 1/3 CTK (avg over z&L)
• obscurer may be Eddington-rate dependent
• to explain redshift evolution of L-dependence
• “radiation-lifted torus” – for modellers & simulators
• host galaxy is an important CTN obscurer in AGN+LGRBs
• LGRB are dominated by host galaxy obscuration, and show little evolution
• These observational results are supported by state-of-the-art cosmological simulations and may be used to calibrate AGN feedback strengths
• Probe of metal gas content in z=0.5-3 galaxies