AGN outflow feedback: Constraints from variability

We present an overview on how variability can be used to constrain the location of the ionized outflow in nearby Active Galactic Nuclei using high‐resolution X‐ray spectroscopy. Without these constraints on the location of the outflow, the kinetic luminosity and mass loss rate can not be determined. We focus on the Seyfert 1 galaxy NGC 5548, which is arguably the best studied AGN on a timescale of 10 years. Our results show that frequent observations combined with long term monitoring, such as with the Rossi X‐ray Timing Explorer (RXTE) satellite, are crucial to investigate the effects of these outflows on their surroundings.