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About

D. Hildebrand is a researcher specializing in very high energy (VHE) gamma-ray astronomy, with a particular focus on blazar monitoring and innovative detector technology for Imaging Air Cherenkov Telescopes (IACTs). Their most significant contribution lies in the development and scientific exploitation of the First G-APD Cherenkov Telescope (FACT), a pioneering instrument that introduced silicon photomultipliers (SiPMs, also known as G-APDs) as photosensors in Cherenkov astronomy — a technological milestone that has since influenced the broader field of ground-based gamma-ray detection. Hildebrand's work has been central to establishing long-term, unbiased monitoring of TeV-bright blazars, tracking intensity variations across timescales from minutes to years to probe the physics of relativistic jets and central engine processes in Active Galactic Nuclei. Their contributions to FACT's robotic and remote operation, active since 2011 at the Observatorio del Roque de los Muchachos, helped maximize observational duty cycles and minimize data gaps — producing one of the most comprehensive blazar monitoring datasets at TeV energies. With cumulative citations exceeding 49 across their key publications, Hildebrand's work represents a meaningful bridge between instrumentation innovation and high-energy astrophysical science.