The Cherenkov Telescope Array
The Cherenkov Telescope Array (CTA) is a next generation facility for the detection of the most energetic gamma-rays from space, signatures of astrophysical particle acceleration.
CTA will comprise more than 100 telescopes of three different sizes; large, medium and small; with mirror diameters of 23m, 12m and 4m respectively.
At UZH, we are involved with the development of FlashCam, a prototype camera for the medium-sized telescopes of CTA. In September 2018, FlashCam was successfully tested on a prototype telescope.
We are also involved in CTA software development for calibration and data analysis.
Pulsar Wind Nebulae
The pulsar wind nebula HESS J1825-137 reduces in size with increasing energy. See the full study for more details.
Pulsar Wind Nebulae are a common source class of astrophysical very high energy (VHE) gamma-rays.
Copious amounts of leptons (electrons and positrons) are produced in the immediate environment of the pulsar. These leptons interact with the surrounding medium to produce gamma-rays, detectable at Earth.
The leptons lose energy as they travel away from the source, leading to signature energy-dependent morphology, such as seen in the pulsar wind nebulae HESS J1825-137.