Dear all,

We are pleased to announce the 2026 North American Einstein Toolkit Workshop and School. The Workshop will be held at the University of Illinois Urbana-Champaign from 15-18 June 2026 and will also be accessible online.

The Workshop will provide an opportunity for researchers and students to learn about the Einstein Toolkithttps://einsteintoolkit.org/index.html, a community-driven software platform comprising core computational tools that support and advance research in relativistic astrophysics and gravitational physics. It will feature a mix of talks and tutorials, including introductory sessions for new users as well as advanced topics for experienced users.

We will offer several tutorials on CarpetX and science codes based on CarpetX, the new GPU-enabled driver in the Einstein Toolkit ecosystem. The talks will likewise support new users while highlighting exciting science cases and the latest developments in numerical relativity. The Workshop will be fully hybrid, with all in-person sessions broadcast live over Zoom for online participants.

Details and registration are available on our website: https://etksummerschool2026.illinois.edu/

The relevant deadlines are as follows: In-person registration: May 8, 2026 Online registration: June 14, 2026 Travel support request: April 19, 2026

We hope to see you in Urbana-Champaign in June 2026.

Kind regards, Jay Kalinani On behalf of the Local Organizing Committee: Noora Ghadiri, Jay Kalinani, Maxwell Rizzo, Helvi Witek Scientific Organizing Committee: Steve Brandt, Zach Etienne, Noora Ghadiri, Roland Haas, Jay Kalinani, Maxwell Rizzo, Nicolas Sanchis-Gual, Helvi Witek, Yosef Zlochower