The Obelisk simulation has been run on a the Occigen machine of Cines, through grants A0040406955 and A0040407637 made by Genci, as well as on the Joliot-Curie machine at Tgcc through the Prace project 2018184444.

The simulation is hosted and has been post-processed and analysed using the Horizon (and now Infinity) clusters at the Institut d’Astrophysique de Paris: we very warmly thank Stéphane Rouberol for running it smoothly for us.