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2026 North American Einstein Toolkit Workshop, Urbana-Champaign, USA
by Kalinani, Jay 22 Mar '26

22 Mar '26

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 Toolkit<https://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

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Workshop: New Frontiers in Strong Gravity, Benasque, 19-31 July 2026 (2nd announcement)
by Helvi Witek 20 Mar '26

20 Mar '26

Dear colleagues, The fourth installment of the two-week workshop “New frontiers in strong gravity” will take place in Benasque, Spain, from 19-31 July 2026. The registration is now open at the website https://benasque.org/2026relativity/ where you can find further information. The goal of the workshop is to foster new ideas and collaborations by bringing together experts across different disciplines, including gravity, gravitational wave astrophysics, numerical and mathematical relativity. We plan for only two talks per day, with ample time for informal discussions, sessions and collaborations. We aim at creating a diverse and inclusive meeting that thrives through communication and discussion, and we would greatly welcome participation and contributions from different communities, as well as researchers at different career stages. Invited speakers include: Josu Aurrekoetzea - Miguel Bezares - Marina de Amicis - Elena Georgi - Archisman Ghosh - Ruth Gregory - Kelly Holley-Bockelmann - Alex Jenkins - Elisa Maggio - Simone Mastrogiovanni - Julio Parra-Martinez - Rafael Porto - B. Sathyaprakash - Thomas Sotiriou - Leonard Susskind - Rodrigo Vicente - Nils Vu - Silke Weinfurtner - Sebastian Zell We look forward to welcoming you to Benasque, Helvi On behalf of the organisers (D. Blas, P. Figueras, S. Nissanke, L. Stein, H. Witek --------------------------------------------- Dr. Helvi Witek Associate Professor Department of Physics University of Illinois at Urbana-Champaign 247 Loomis Lab 1110 W Green St Urbana, IL 61801 ---------------------------------------------

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Meeting minutes for 2026-03-05
by Steven Brandt 18 Mar '26

18 Mar '26

Present: Roland, Steve, Peter, Keith, Maxwell Rizzo, Rahime Matur, Nikolai, Cheng-Hsin, Zach, Lucas Chair: Roland Minutes: Steve Release: - It's time to regenerate the thorns. We should do it ASAP. Beyhan will attempt to run them. - Are we still using AutoConf2.13? No. Roland will update the Release Process for AutoConf. - Add Boost to the release details (Boost has to be 84 or less) - Time to start testing, driving reviews, etc. - Roland is linking the testing process - CapyrX: Lucas says that it now has continuous integration tests in its repo, based on CarpetX tests. Roland asks to add it to the manifest. - CanudaX: Cheng-Hsin says not much updates. Roland asks to add it to the manifest. - BHaHaHa: Zach says its updated to the latest NRPy and latest toolkit and added to the manifest. - BHNS Gallery Example: Sumbit paper to Archive this week. Create thumbnail and web page. - Boost: Roland is the champion. - Cottonmouth: We'll get into the manifest soon. - Add Machine: DIRAC/Cosma's simfactory files (Rahime) RK4 paper has been formally accepted. Questions on the mailing list: Strange failures on setting parameters Can he had Deucalion to Simfactory CarpetX cannot compile with the latest CUDA. Open tickets by update time: 2910: Add option to exclude 1d boundaries. 2921: Lucas: Use boundary conditions with Multipatch. 2908: Will poke Max 2909: Remove tags 2898: Waiting for review. 2912: Inconsistent computation of volume 2855: NoiseX - may use hash of coordinate value instead of random number generator 2814: TensortypeAlias - Maybe obsoleted by 2909 Gravitation/cannot/be held responsible for/people falling in love -- Einstein/

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No Einstein Toolkit Meeting Reminder
by Roland Haas 18 Mar '26

18 Mar '26

Hello all, Due to APS April meeting 2026 there will not be an Einstein Toolkit phone call on Thursday. Yours, Roland -- My email is as private as my paper mail. I therefore support encrypting and signing email messages. Get my PGP key from http://pgp.mit.edu .

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Meeting minutes for 2026-03-12
by keithdow＠keithdow.net keithdow＠keithdow.net 12 Mar '26

12 Mar '26

Present: Roland, Peter, Keith, Noora Ghadiri, Rahime Matur, Nikolai, Cheng-Hsin, Zach, Beyhan Chair: Peter Minutes: Keith Announcements: No ETK meeting next week because of the APS meeting. Registration has opened for the 2026 North American ETK Workshop and School June 15-18, Urbana, Illinois National Center for Supercomputing applications, Room 1040. Release - Gallery runs start in April. - Peter to review the BHNS. - Tests should be run on various clusters. - CarpetX doesn’t work with the latest version of CUDA. - No progress on CanudaX. Questions on the mailing list: Range of parameters works on some machine but not others. Buggy compiler?? Suggestion, run it again with a new compiler. Open tickets by update time: 2908: Ready for review. 2922: Big headache. AMReX made a fundamental change to their database. No easy solution. 2913: Needs more work. 2903: Why no PR? Misc. Boost reviewer Beyhan.

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Einstein Toolkit Meeting Reminder
by users＠einsteintoolkit.org 11 Mar '26

11 Mar '26

Hello, Please consider joining the weekly Einstein Toolkit phone call at 9:00 am US central time on Thursdays. For details on how to connect and what agenda items are to be discussed, use the link below. ** DAYLIGHT SAVING TIME WARNING ** Please note that the US / EU has already / not yet transitioned to / from daylight saving time. The phone call will be at 15:00 Central EU time. https://docs.einsteintoolkit.org/et-docs/Main_Page#Weekly_Users_Call --The Maintainers

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Agenda for Thursday's Meeting
by users＠einsteintoolkit.org 09 Mar '26

09 Mar '26

Please update the Wiki with agenda items for Thursday's meeting. Thanks! https://docs.einsteintoolkit.org/et-docs/meeting_agenda --The Maintainers

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Inquiry about making a research thorn available for use in the Einstein Toolkit
by Vinicius 09 Mar '26

09 Mar '26

Dear Einstein Toolkit team, My name is Vinicius Ramos Rodrigues, and I am currently developing a research module (thorn) intended for use with the Einstein Toolkit in the context of numerical relativity research. The module is being designed as a processual stress-energy sector compatible with the Toolkit infrastructure, including coupling through TmunuBase and evolution with MoL/BSSN-based setups. My goal is to make this implementation available for research use and to ensure that it follows the most appropriate technical and community standards for the Einstein Toolkit ecosystem. I would like to ask for your guidance on the best path for doing this. In particular, I would appreciate advice on: whether there is a recommended procedure for sharing a new research thorn with the community, whether there are preferred coding, documentation, or testing requirements before such a thorn is made available, and whether contribution through a public repository or another review process would be the most suitable route. If useful, I can also provide a short technical summary of the module, its equations, intended use case, and current implementation status. Thank you very much for your time and for maintaining such an important resource for the numerical relativity community. Best regards, Vinicius Ramos Rodrigues

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Einstein Toolkit Meeting Reminder
by users＠einsteintoolkit.org 04 Mar '26

04 Mar '26

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Agenda for Thursday's Meeting
by users＠einsteintoolkit.org 02 Mar '26

02 Mar '26

Please update the Wiki with agenda items for Thursday's meeting. Thanks! https://docs.einsteintoolkit.org/et-docs/meeting_agenda --The Maintainers

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