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Abstract

With pulsar timing experiments gravitational waves can be detected in much the same way as with laser interferometers. Primary source candidates include a postulated stochastic background of gravitational waves by merging supermassive black hole systems in the cores of galaxies, and individual such systems. We provide upper limits from current pulsar timing array experiments, and highlight the technicalities involved in making an actual detection. As an overview, we describe the pulsar timing data, the data analysis techniques currently in use to search for these gravitational waves, and we discuss the potential detectable sources of future pulsar timing array experiments.