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About

W. Hofmann is a leading figure in very-high-energy (VHE) gamma-ray astrophysics, with a career centered on the development and scientific exploitation of imaging atmospheric Cherenkov telescopes. His key research areas include the study of active galactic nuclei (AGN), particularly blazars, and the physics of cosmic particle acceleration. Hofmann’s major contributions are exemplified by his work on the High Energy Stereoscopic System (HESS), where he played a pivotal role in the multi-wavelength campaign on the BL Lac object PKS 2155-304. The 2005 paper detailing simultaneous HESS and X-ray observations of this source, which has garnered over 100 citations, provided groundbreaking insights into the emission mechanisms and rapid variability of these extreme extragalactic objects. This work helped establish HESS as a premier observatory for VHE astronomy. Beyond this, Hofmann has been instrumental in advancing detector technology and analysis techniques for ground-based gamma-ray astronomy. His sustained impact is reflected in his high citation counts and his leadership in shaping the field, making him a key figure for students and researchers studying the non-thermal universe.