The LIGO Scientific Collaboration (LSC) is a scientific collaboration of international physics institutes and research groups dedicated to the search for gravitational waves. It complements the LIGO Laboratory, an organization based at the California Institute of Technology and Massachusetts Institute of Technology which constructed and now operates the LIGO observatories. The LSC contributes to developing detector technologies, assists with collecting and validating data from the LIGO and GEO600 detectors, and is responsible for analyzing the data and publishing scientific results. The LSC is led by a Spokesperson, which as of 2025 is Stephen Fairhurst of Cardiff University.