Largest ever Cherenkov telescope sees first light on 26th July

A new eye on the high-energy cosmos opened on Thursday 26 July. With a total area of 614 sq m, the Hess facility is the largest "Cherenkov telescope" ever made. It catches the light made when high-energy gamma rays hit the atmosphere, creating cascades of particles which briefly exceed the speed of light in air, giving hints about the rays' sources: supermassive black holes, pulsars and supernovae. Here, the gamma-ray sky over Namibia is superimposed on an image of one of Hess' dishes.
“The new telescope not only provides the largest mirror area among instruments of this type worldwide, but also resolves the cascade images at..................
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