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Agenda for Thursday's Meeting
by rhaas＠illinois.edu 15 Jan '24

15 Jan '24

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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Fw: PhD fellowships
by Roland Haas 15 Jan '24

15 Jan '24

Begin forwarded message: Date: Mon, 15 Jan 2024 14:23:18 +0100 From: Enrico Barausse <barausse(a)sissa.it> To: Enrico Barausse <EnricoBarausse(a)gmail.com> Subject: PhD fellowships Dear Colleagues please find below the link to a call for applications to our PhD program, in case you know of potentially interested students https://hyperspace.uni-frankfurt.de/2024/01/15/phd-fellowships-at-sissa-ita… best regards Enrico Barausse

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meeting minutes for 2024-01-11
by Roland Haas 11 Jan '24

11 Jan '24

Present: Roland, Peter, Steve, Leo, Andya, Sam, Samuel, Xinyue, Zach ET release: * ET release manager search for 2024_05: Steve (main), Roland (asst) * Peter will update TOV gallery example * Steve found that BNS example differs in new release, Roland will try and run on his workstation to verify Simfactory issues: * Steve has trouble getting simfactory to work on db1 for submission, it ignores sourcebasedir Open tickets: * https://bitbucket.org/einsteintoolkit/tickets/issues/2770 Roland will report issue to ADIOS2 * https://bitbucket.org/einsteintoolkit/tickets/issues/2771 Roland has been in contact with Wolfgang and Michal, they have implemented a similar fix in SGRID's master branch and Roland will backport * https://bitbucket.org/einsteintoolkit/tickets/issues/2520 Peter will re-run TOV example with updated parameters to see if there are visible changes Chapter on ET in Springer book: * Peter and Stefan Rosswog are adding SphincsBSSN code * Leo, Sam, Steve volunteer for ET section, will try and coordinate with Peter * will create skeleton for chapter, add division of space for codes * TODO: check if we need to describe BSSN codes * TODO: Roland to periodically poke * TODO: Roland to see if GRhydro authors can contribute Code changes policy * Samuel asked about how larger changes to contributed code are handled * Roland said that this is effectively up to the authors. The ET is conservative with changes to release branches that should be limited to obvious important bug fixes * For code changes the ET asks that all changes are reviewed but that does to have to be in the ET ticket system and could be code internal * Sam points out that changes that require changing parameter files need to have a deprecation warning for one release before they can be made 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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Einstein Toolkit Meeting Reminder
by rhaas＠illinois.edu 10 Jan '24

10 Jan '24

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. https://docs.einsteintoolkit.org/et-docs/Main_Page#Weekly_Users_Call --The Maintainers

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Agenda for Thursday's Meeting
by rhaas＠illinois.edu 08 Jan '24

08 Jan '24

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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Postdoctoral positions at University of Southampton
by Ian Hawke 08 Jan '24

08 Jan '24

Dear Colleagues, Happy New Year and best wishes for 2024 to everyone! The Gravity group at the University of Southampton is seeking applications to fill three Postdoctoral positions in gravitational-wave astrophysics. Each position is available for two years with a start date of 1 October 2024. The Southampton group is one of the leading modelling groups in gravitational-wave astronomy in Europe, currently comprising 7 staff members and a number of postdocs and PhD students. Research in the group includes black-hole and neutron-star physics, gravitational-wave source modelling and data analysis, numerical relativity and gravitational self-force modelling. Members of the group are actively involved with the LIGO Scientific Collaboration, the Einstein Telescope and Cosmic Explorer Collaborations and the LISA Consortium. 1) Senior Research Fellow in Gravitational-Wave Physics The successful candidate will undertake research to establish the science case for the next generation of gravitational-wave observatories, Cosmic Explorer and Einstein Telescope. Particular focus will be on understanding the network capability to constrain aspects of neutron-star physics. The ideal applicant will have a track record in at least one of the following research areas: gravitational-wave astronomy and data analysis, neutron star modelling and numerical relativity. The post is supported by UKRI funding for next-generation gravitational waves and the research will be carried out jointly with colleagues at the Universities of Cardiff and Birmingham. For further details and applications, see https://jobs.soton.ac.uk/Vacancy.aspx?ref=2568324PJ 2) Research Fellow in Numerical Relativity The successful candidate will contribute to work aimed at carrying out numerical simulations of neutron star mergers with realistic physics, with particular focus on resistive magnetohydrodynamics. The ideal applicant will have a track record in numerical relativity and some understanding of neutron star modelling, gravitational-wave astronomy and data analysis. For further details and applications, see https://jobs.soton.ac.uk/Vacancy.aspx?ref=2567724PJ 3) Research Fellow in Gravitational-Wave Physics The successful candidate will contribute to developing an accurate description of dynamical tides for models involving realistic neutron-star physics. The ideal applicant will have a track record in neutron star modelling and gravitational-wave astronomy and some understanding of related data analysis. For further details and applications, see https://jobs.soton.ac.uk/Vacancy.aspx?ref=2568724PJ Applicants are expected to have, or be about to obtain, a relevant PhD degree in physics or mathematics. The closing date for all applications is Thursday 25 January 2024. For informal enquiries about these posts please contact Nils Andersson N.Andersson(a)soton.ac.uk<mailto:N.Andersson@soton.ac.uk>, Ian Jones dij(a)maths.soton.ac.uk<mailto:dij@maths.soton.ac.uk> or Ian Hawke I.Hawke(a)soton.ac.uk<mailto:I.Hawke@soton.ac.uk>.

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Re: [Users] request for assistance
by Steven Brandt 18 Dec '23

18 Dec '23

It looks like the machine you are on does not allow you to use curl to download. Maybe checkout Cactus on your laptop and scp it to your machine? --Steve On 12/15/2023 12:16 PM, BRINGEN BUKAR wrote: > In an attempt to install the ET this error keep occurring can someone > help me out. Thank you > > On Fri, 15 Dec 2023, 4:50 pm Steven R. Brandt, <sbrandt(a)cct.lsu.edu> > wrote: > > > On 12/15/2023 7:50 AM, Liu Xiang wrote: > > Dear Einstein Toolkit developers, > > > > My name is Liu and I am a student from Nagoya University. I am now > > learning to use ET to do some simulations. This time I am trying to > > reproduce this: > > https://einsteintoolkit.org/gallery/bns/index.html > > which is a simulation of binary neutron stars. > > > > During execution, I noticed this segmentation fault here when > creating > > the simulation directory structure. (The screenshot file is > attached > > to this email) This seems to be caused by a mismatch in memory > > settings. I've tried many debugging methods, but it still > doesn't work. > > Can you clarify what you mean by "mismatch in memory settings?" Also, > what debugging methods have you tried? Have you attempted to get a > stack > trace with gdb? > > Thanks, > > Steve > > > > > Could you please help me identify the issue? I am using Ubuntu > 22.04.3 > > and I have already built the Einstein Toolkit and run a sample > > simulation successfully. > > > > Thank you very much for your sincerest help. > > > > Best regards, > > Liu Xiang > > > > > > > > _______________________________________________ > > Users mailing list > > Users(a)einsteintoolkit.org > > http://lists.einsteintoolkit.org/mailman/listinfo/users > _______________________________________________ > Users mailing list > Users(a)einsteintoolkit.org > http://lists.einsteintoolkit.org/mailman/listinfo/users >

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request for assistance
by Liu Xiang 15 Dec '23

15 Dec '23

Dear Einstein Toolkit developers, My name is Liu and I am a student from Nagoya University. I am now learning to use ET to do some simulations. This time I am trying to reproduce this: https://einsteintoolkit.org/gallery/bns/index.html which is a simulation of binary neutron stars. During execution, I noticed this segmentation fault here when creating the simulation directory structure. (The screenshot file is attached to this email) This seems to be caused by a mismatch in memory settings. I've tried many debugging methods, but it still doesn't work. Could you please help me identify the issue? I am using Ubuntu 22.04.3 and I have already built the Einstein Toolkit and run a sample simulation successfully. Thank you very much for your sincerest help. Best regards, Liu Xiang

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request for assistance
by Liu Xiang 15 Dec '23

15 Dec '23

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ET_2023_11 "Lise Meisner" Einstein Toolkit Release Announcement
by Cupp, Samuel D. 14 Dec '23

14 Dec '23

Release Announcement Click here to read the announcement in HTML (with hyperlinks): https://einsteintoolkit.org/about/releases/ET_2023_11_announcement.html We are pleased to announce the twenty-seventh release (code name "Lise Meitner") of the Einstein Toolkit, an open-source, community-developed software infrastructure for relativistic astrophysics. The major changes in this release include: Several new arrangements and thorns have been added: * CarpetX arrangement for the new AMReX-based mesh driver and supporting thorns * GRHayLib for access to the General Relativistic Hydrodynamics Library (GRHayL) * GRHayLID for simple GR(M)HD initial data using GRHayLib (e.g. Balsara tests, isotropic gas) * GRHayLHD for GRHD evolution using GRHayL (equivalent to IllinoisGRMHD with no magnetic fields) * GRHayLIDX for CarpetX version of GRHayLID; this thorn currently runs on the host, not the gpu * GRHayLHDX for CarpetX version of GRHayLHD; this thorn currently runs on the host, not the gpu * DNSdata for importing SGRID initial data New capabilities for existing codes: * Seed_Magnetic_Fields has been updated to support both TOV and BNS magnetic fields; explicit IllinoisGRMHD scheduling dependency removed to support broader usage; some parameter options are deprecated and will be removed in the next release In addition, bug fixes accumulated since the previous release in May 2023 have been included. The Einstein Toolkit is a collection of software components and tools for simulating and analyzing general relativistic astrophysical systems that builds on numerous software efforts in the numerical relativity community, including code to compute initial data parameters, the spacetime evolution codes Baikal, lean_public, and McLachlan, analysis codes to compute horizon characteristics and gravitational waves, the Carpet AMR infrastructure, and the relativistic (magneto)hydrodynamics codes GRHayLHD, GRHayLHDX, GRHydro, and IllinoisGRMHD. Data analysis and post-processing is handled by the kuibit library. The Einstein Toolkit also contains a 1D self-force code. For parts of the toolkit, the Cactus Framework is used as the underlying computational infrastructure, providing large-scale parallelization, general computational components, and a model for collaborative, portable code development. The Einstein Toolkit uses a distributed software model, and its different modules are developed, distributed, and supported either by the core team of Einstein Toolkit Maintainers or by individual groups. Where modules are provided by external groups, the Einstein Toolkit Maintainers provide quality control for modules for inclusion in the toolkit and help coordinate support. The Einstein Toolkit Maintainers currently involve staff and faculty from five different institutions and host weekly meetings that are open for anyone to join. Guiding principles for the design and implementation of the toolkit include: open, community-driven software development; well thought-out and stable interfaces; separation of physics software from computational science infrastructure; provision of complete working production code; training and education for a new generation of researchers. For more information about using or contributing to the Einstein Toolkit, or to join the Einstein Toolkit Consortium, please visit our web pages at http://einsteintoolkit.org, or contact the users mailing list users(a)einsteintoolkit.org. The Einstein Toolkit is primarily supported by NSF 2004157/2004044/2004311/2004879/2003893/2114582/2227105 (Enabling fundamental research in the era of multi-messenger astrophysics). The Einstein Toolkit contains about 400 regression test cases. On a large portion of the tested machines, almost all of these tests pass, using both MPI and OpenMP parallelization. Deprecated functionality * Seed_Magnetic_Fields: to support the changes, parameter options were renamed; the old options are deprecated and will be removed in the next release * Seed_Magnetic_Fields_BNS is slated to be removed in the next release, as its features have been merged into Seed_Magnetic_Fields Contributors Among the many contributors to the Einstein Toolkit and to this release in particular, important contributions to new components were made by the following authors: * Federico G. Lopez Armengol * Steven R. Brandt * Michail Chabanov * Cheng-Hsin Cheng * Samuel Cupp * Alexandru Dima * Jake Doherty * Lorenzo Ennoggi * Zachariah Etienne * Roland Haas * Terrence Pierre Jacques * Liwei Ji * Jay Kalinani * Philipp Moesta * Michal Pirog * Lucas Timotheo Sanches * Erik Schnetter * Swapnil Shankar * Wolfgang Tichy * Leonardo Werneck How to upgrade from Schwarzschild Release (ET_2023_05) To upgrade from the previous release, use GetComponents with the new thornlist to check out the new version. See the Download page (http://einsteintoolkit.org/download.html) on the Einstein Toolkit website for download instructions. The SelfForce-1D code uses a single git repository; thus, using git pull; git checkout ET_2023_11 will update the code. To install Kuibit, do the following: pip install --user -U kuibit==1.4.0 Machine notes Supported (tested) machines include: * Debian, Ubuntu, Fedora, Mint, OpenSUSE, and macOS X installations with dependencies installed as prescribed in the official installation instructions * Anvil * Deep Bayou * Delta * Expanse * Frontera * Sunrise Note for individual machines: * TACC machines: defs.local.ini needs to have `sourcebasedir = $WORK` and `basedir = $SCRATCH/simulations` configured for this machine. You need to determine $WORK and $SCRATCH by logging in to the machine. All repositories participating in this release carry a branch ET_2023_11 marking this release. These release branches will be updated if severe errors are found. The "Lise Meitner" Release Team on behalf of the Einstein Toolkit Consortium (2023-12-14) * Samuel Cupp * Steven R. Brandt * Peter Diener * Zachariah Etienne * Roland Haas * Liwei Ji * Deborah Ferguson * Gabriele Bozzola * Hyun Park December 14, 2023

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