
The Future of Gravitational-Wave Detection with Pulsar Timing: A Data Analysis Perspective
Rutger van Haasteren of the Max Planck Institute for Gravitational Physics argues that, despite strong claims in the literature, pulsar timing arrays have not yet produced a confirmed detection of gravitational waves. Speaking at the IAS/Princeton Joint Astrophysics Colloquium, he walks through the statistical tools used to search for nanohertz gravitational waves, the limits of current methods for reconstructing the spatial correlations that would prove a detection, and his proposal to replace years-long international data-combination efforts with continuously updated analysis of the shared global dataset. He also weighs how AI-assisted coding could speed up methods development while fragmenting common software, and discusses the interstellar medium as an uncontrolled noise source in the pulsar array. The talk is a working scientist's critical outlook rather than a polished overview, aimed at colleagues who want to know what stands between current data and a robust detection.