I will report on long-term monitoring campaign with the NASA Swift mission.

Besides the the NASA Flagship missions Chandra and HST, Swift is NASA's Number 1 mission.

While Swift was launched more than 15 years ago as a Gamma Ray Burst observatory

over the last decade it has morphed into the major tool for time-domain Astrophysics

including studies of Active Galactic Nuclei (AGN). These super-massive accreting black holes

in the center of galaxies are the most luminous persistent object in Universe. However, many

of these AGN display dramatic flux variations on the UV and X-rays which can be explain for

example by absorption and dramatic changes in the accretion rate.

In my talk I will first introduce the NASA Swift observatory and its achivement for Astrophysics
before I will discuss the results of AGN studies with Swift.