portal.cta-observatory.org

On 26 November, a prototype telescope proposed for CTA, the GCT, recorded CTA’s first Cherenkov light while undergoing testing in Paris. This image shows one of the events, which was caused by a cosmic ray creating air showers in the atmosphere. It will be studied by CTA astronomers to determine the incoming direction and energy of the particle that created the air shower. News release: goo.gl/5lTxQQ