Prototyping the graphical user interface for the operator of the Cherenkov Telescope Array

International audienceThe Cherenkov Telescope Array (CTA) is a planned gamma-ray observatory. CTA willincorporate about 100 imaging atmospheric Cherenkov telescopes (IACTs) at a Southernsite, and about 20 in the North. Previous IACT experiments have used up to five telescopes.Subsequently, the design of a graphical user interface (GUI) for the operator of CTAinvolves new challenges. We present a GUI prototype, the concept for which is beingdeveloped in collaboration with experts from the field of Human-Computer Interaction (HCI).The prototype is based on Web technology; it incorporates a Python web server,Web Sockets and graphics generated with the d3.js Javascript library