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About

T. Granzer is an astrophysicist whose career has centered on two interconnected pillars: the development of robotic observatory technology and the study of stellar activity in cool and binary stars. Based at the Astrophysical Institute Potsdam (AIP), Granzer has been a driving force behind the STELLA robotic observatory on Tenerife, Spain — a landmark facility featuring two fully autonomous 1.2-meter telescopes capable of conducting high-resolution spectroscopy and photometric monitoring without any human intervention. His foundational 2004 paper introducing STELLA has garnered 115 citations, reflecting the facility's broad influence on modern observational astronomy. Beyond instrumentation, Granzer has applied STELLA's capabilities to investigate stellar rotation, chromospheric activity, and lithium abundances in cool binary systems, as well as producing time-series Doppler imaging of active giant stars like HD 208472 to map starspot distributions across stellar surfaces. His work on robotic telescope methodology, including a widely-read conceptual treatment of what distinguishes a truly robotic telescope from a merely automated one, has shaped how the community designs and evaluates autonomous observing systems. He also contributed to opportunistic observations of comet 67P/Churyumov–Gerasimenko during perihelion and explored Antarctic telescope deployments, demonstrating a versatility that makes him a valued figure in observational infrastructure and stellar astrophysics alike.