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Einstein Toolkit Meeting Reminder
by users＠einsteintoolkit.org 09 Mar '22

09 Mar '22

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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2022 ET North American Workshop: Registration Open!
by Zach Etienne 09 Mar '22

09 Mar '22

Hi everyone! Registration for the 2022 North American Einstein Toolkit Workshop & Summer School is now open, and will remain open through May 1. As indicated in the initial announcement ( http://lists.einsteintoolkit.org/pipermail/users/2022-February/008413.html), this is a hybrid conference with both virtual and in-person attendance possible (in-person is encouraged). To register, please fill out the following Google Form: https://forms.gle/qyu4pThtaAHJxpdt5 More details are provided at the official website: https://einsteintoolkit.github.io/et2022uidaho/index.html We look forward to seeing you there! Sincerely, -Zach, on behalf of the Scientific Organizing Committee Gabrielle Allen Steve Brandt Zachariah Etienne Roland Haas Christiana Pantelidou Leonardo Werneck Helvi Witek * * * Zachariah Etienne Assoc. Prof. of Physics, U. of Idaho Adjunct Assoc. Prof. of Physics & Astronomy, West Virginia U. http://astro.phys.wvu.edu/zetienne/ http://blackholesathome.net

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Agenda for Thursday's Meeting
by users＠einsteintoolkit.org 07 Mar '22

07 Mar '22

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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Meeting Minutes 2022-03-03
by Gabella, William E 03 Mar '22

03 Mar '22

Present: Peter D, Yosef Z, Miguel G, Maria H, Gabriele B, Leo W, Atul K, Steve B, Bill G, Zach E Chair: Steve B, Minutes: Bill G * A cute new feature in kuibit inspired by [https://jiffyclub.github.io/snakeviz/ snakeviz] [GB] Gabriele, Snakevix is a python tool to visualize profiling information. If you run the profiler you can get a nice visualization. Would like something similar for the ETK, since we output timing information, should be able to do this. In the Kuibit developer version, added a new module, works with timers and you get a tree with the names of nodes and times, different MPI ranks, and can manipulate them. Creates Timer Trees. Can walk through the call stack, see Evolve takes most of the time, etc. Built because it looks cool but seems useful. Output the XML timing information with ETK and a script in Kuibit that reads it. Combines and creates the Tree object in Kuibit, non-trivial to merge different trees with different nodes, output to JSON and javascript to read it and make the visualization. Carpet puts out the XML information, enable OUTPUT_XML_TIMERS, maybe. In the developer documentation https://sbozzolo.github.io/kuibit/dev/timers.html , and the code for the example shown https://sbozzolo.github.io/kuibit/dev/examples/bins/interactive_timertree.h… . Steve, Sample output would be nice to have there too. * Release Planning https://docs.einsteintoolkit.org/et-docs/Release_Process https://docs.einsteintoolkit.org/et-docs/Release_Details ** Yosef, have we settled on what is to be included in the new release. We think the FLRW is to be included. Peter D, Sam has some work on the self-force code that could be ready. ** Gallery examples, volunteers (many veterans) *** Poisson Eqn, Miguel G *** BNS Merger, Atul K *** Multipatch Scalar Wave Eqn, Bill G *** Single stable NS, Peter D *** Binary Black Hole, ??, last time a student at Illinois. ** Teststuites? Usually run them closer to the release? Our guides says start in 2 months before release. ** The one month before regenerate the NRPy and Kranc codes, and Steve had trouble with those last time...as in it did not happen. ** Yosef trying to find personal info to edit the Wiki; will sort it out. ** Gabriele, on releases, we should have more information about the changes between the releases. Use it to see if he needs to update his ETK. It would be nice to make a more detailed "Change Log." Steve, Zach suggested we create a checkout of all the thorns with a single Git Checkout, then you could do a diff between releases and less of a pain to upgrade. It would also make it easier to update the toolkit. Zach, thinks it would reduce the overhead of a new release too. All the thorns put in a single repo (see below). Now collecting changes is difficult because there are so many repos, and inside one maybe only a small fraction might be in the release, at least for the NRPy repo. So a repo of the Arrangements and Flesh, updated every release, and should be obvious what changed between releases. Zach also thinks that makes a good default install for new users...a git clone <new release>. Gabriele, I would still like to know WHY those thorns changed, so still very useful to have a detailed ChangeLog. Zach, I would also like to see this. It does add some burden. Gabriele, other codes you put the burden on the developer to add the line to the ChangeLog file when you commit to a repo. Steve, we could make a list of Tickets that were closed. This is likely a single search. We should try to do this. Yosef, within Git for the commit message can we ask if they are addressing some ticket number, etc. Steve made a Github release for the ETK, the latest release: https://github.com/stevenrbrandt/einsteintoolkit.git . Steve, for the two codes, Kuibit and Self-force those maintainers should share short announcements with the release manager. Want the highlights given to the manager, with possible more information can be found at some link. * ET Workshop, Idaho, 13-17 June 2022 https://hyperspace.uni-frankfurt.de/2022/02/23/north-american-einstein-tool… https://einsteintoolkit.github.io/et2022uidaho/ Zach, had a question about the ET Workshop, so Leo adjusted the Google form to send a copy to the person creating the form. Was just announced yesterday and registration opened Monday evening. Tutorial volunteers? Preferably in-person, but could do remote...believe we will have a number of experts on site. Leo, how to reply to the workshop email list and have it go to all the participants? Check with Roland, he administers Workshop mailing list. Atul, tutorials in the workshop, Yosef or Eric gave one on how to read a general par file, liked that very much. Did not find that tutorial on YouTube. Zach, thinks the lectures and science talks are on YouTube. [https://www.einsteintoolkit.org/tools/unanswered.php unanswered question on mailing list] Looks handled. [https://bitbucket.org/einsteintoolkit/tickets/issues?status=open&status=new… open tickets sorted by update time] [https://bitbucket.org/einsteintoolkit/tickets/issues?status=new&status=open… tickets ready for review] Chairs and Minute takers: 17 March: Chair, Peter D; Minutes, Atul K -- ===================================== William Gabella Research Assistant Professor Department of Physics and Astronomy Vanderbilt University Nashville, TN USA b.gabella(a)vanderbilt.edu (o) 615-343-2713

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Einstein Toolkit Meeting Reminder
by users＠einsteintoolkit.org 02 Mar '22

02 Mar '22

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Agenda for Thursday's Meeting
by users＠einsteintoolkit.org 28 Feb '22

28 Feb '22

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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Agenda for Thursday's Meeting
by users＠einsteintoolkit.org 28 Feb '22

28 Feb '22

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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Einstein Toolkit Meeting Reminder
by users＠einsteintoolkit.org 23 Feb '22

23 Feb '22

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North American Einstein Toolkit School 2022
by Zach Etienne 23 Feb '22

23 Feb '22

We are pleased to announce that the 2022 North American Einstein Toolkit School will be held at the University of Idaho June 13-17, 2022. This will be a hybrid meeting, with both in-person and virtual attendees welcome to participate. The school will provide an opportunity for researchers and students to gather and learn about the Einstein Toolkit. The Einstein Toolkit provides a community-driven software platform of computational tools to advance and support research in relativistic astrophysics and gravitational physics. As such, the Workshop will offer a mixture of talks and tutorials designed to build a community around this important research and the software that helps sustain it. The talks will report on both the latest developments in numerical relativity, as well as new applications of the Einstein Toolkit to generate interesting science. This year, a special field trip will be offered for in-person participants to nearby LIGO Hanford, whose direct observation of the gravitational waves from a coalescing pair of black holes led to the 2017 Nobel Prize in Physics. During the visit, LIGO Hanford will be gearing up for the start of O4 (Observing Run 4), due to start at the end of this year. On the same day, virtual participants will have the opportunity to attend an Einstein Toolkit hackathon. Event dates : June 13-17, 2022. Registration and abstract submission: Opens March 1, and will remain open through May 1. To register or learn more, please visit our webpage: https://einsteintoolkit.github.io/et2022uidaho/ If you have any questions, please contact the organizers at workshop(a)einsteintoolkit.org We look forward to seeing you there! The Scientific Organizing Committee

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Magnetized Bondi accretion test with GRHydro
by Jay Vijay Kalinani 21 Feb '22

21 Feb '22

Hi all, I am trying to reproduce the results of the magnetized Bondi accretion test from the GRHydro paper (section 5.7 of https://arxiv.org/abs/1304.5544). I see that there is a sample parfile available for this test within GRHydro_InitData/par. However, I am not sure if this was the one used for the test reported in the paper. Moreover, it uses a thorn 'SmoothedPuncture' which I unfortunately cannot find within Einstein Toolkit. Could someone kindly provide me the right parfile to be used with GRHydro in order to perform this test? Thank you very much in advance! Kind regards, Jay Kalinani

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