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weird behavior with some ET simulations
by Antoni Ramos Buades 04 Mar '19

04 Mar '19

Hi, my name is Antoni Ramos Buades, I am PhD student in the University of the Balearic Islands working with Sascha Husa. We have been using ET with the Llama thorn to produce waveforms. We have observed in some simulations strange behaviors in the waveforms. For example, I have attached a plot of the amplitude of the psi4 of a non-spinning q1 simulation, for different higher order modes, where you can see that the 22, 32 and 44 show weird spikes. We have rerun this simulation outputting 2D data in the x-y plane. We have plotted the Hamiltonian constraint and made a movie (I cannot attach the movie because its size is 42Mb ) but I can attach some snapshots where you can observe that there seems to be an outburst of noise when the boxes are aligned, and this continues happening in the simulation each time the boxes are aligned with each other. Geraint Pratten is also investigating this issue adding some new parameters in the parameter file (attached to the email) for the carpet mesh refinement like freeze_unaligned_parent_levels, freeze_unaligned_levels, ... and running some tests. We would like to ask you if somebidy has ever seen this thing happening before and if somebody knows how one could solve this problem, because with the same Carpet settings we have observed that for some configurations (mass ratio and spins) this does not happen, but for others, like the one presented in this email we do. I have additional quantities as a 2D output like the curvature, metric, horizon, ... in case you think they could be used to check something. Thanks and best regards, Toni.

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meeting minutes for 2019-02-28
by Haas, Roland 28 Feb '19

28 Feb '19

Present: Roland, Chris, Helvi, Yosef, Peter, Sam, Bill, Steve, Antoni, Zach ET release * BNS gallery example - no updates * WVU_Diagnostics - 2 out of 5 thorns have tests now - added all READMEs including usage examples - Zach will add the remaining test cases - Jenkins tests currently running: https://build.barrywardell.net/ * Proca / Lean - no updates - Peter will look at https://bitbucket.org/einsteintoolkit/tickets/issues/2101/add-lean_public-a… to verify the changes that Helvi and Roland made LISA symposium: * discussed that it would be good if a number of ET representatives would be at the symposium http://lists.einsteintoolkit.org/pipermail/users/2019-February/006775.html . Currently Helvi is the only person known to attend. * the next consortium meeting on April 29th, in Florida Gainesville, https://lisacon4.phys.ufl.edu/ ET US meeting: * invited speakers list is about to be finalized * email asking for registration is about to be sent out ET tutorial server: * signup page for accounts still missing * 404 page on server still missing 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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Fwd: LISA Consortium Meeting #4
by Witek, Helvi 28 Feb '19

28 Feb '19

Dear all, here is the official announcement for next LISA Consortium meeting in Gainesville, Florida. Best wishes, Helvi =========================================== Dr. Helvi Witek Royal Society University Research Fellow Theoretical Particle Physics and Cosmology Department of Physics King's College London =========================================== ---------- Forwarded message --------- From: Mueller,Guido <gum1(a)ufl.edu<mailto:gum1@ufl.edu>> Date: Thu, Feb 28, 2019 at 3:01 PM Subject: LISA Consortium Meeting #4 To: consortium(a)lisamission.org<mailto:consortium@lisamission.org> <consortium(a)lisamission.org<mailto:consortium@lisamission.org>>, martin.gehler(a)esa.int<mailto:martin.gehler@esa.int> <martin.gehler(a)esa.int<mailto:martin.gehler@esa.int>>, Paul McNamara <pmcnamar(a)cosmos.esa.int<mailto:pmcnamar@cosmos.esa.int>>, Ira Thorpe <james.i.thorpe(a)nasa.gov<mailto:james.i.thorpe@nasa.gov>>, Livas, Jeffrey (GSFC-6630) <jeffrey.livas-1(a)nasa.gov<mailto:jeffrey.livas-1@nasa.gov>>, Kelly Holley-Bockelmann <k.holley(a)vanderbilt.edu<mailto:k.holley@vanderbilt.edu>> Cc: Conklin,John <jwconklin(a)ufl.edu<mailto:jwconklin@ufl.edu>>, Wass,Peter <pwass(a)ufl.edu<mailto:pwass@ufl.edu>>, Fulda, Paul <pfulda(a)phys.ufl.edu<mailto:pfulda@phys.ufl.edu>>, Simon Barke <barke(a)ufl.edu<mailto:barke@ufl.edu>>, LISA Conference Admin <lisacon(a)phys.ufl.edu<mailto:lisacon@phys.ufl.edu>> Dear all, The LISA Consortium meeting #4 will be held at the University of Florida in Gainesville, Florida. The meeting proper will start on Monday, April 29th and ends on Wednesday, May 1st. Pre- and post meetings are also possible for smaller groups; we are currently working on the schedule. We plan to have a public presentation on Sunday 6pm prior to the meeting followed by a reception. Details are still TBD. Registration is now possible on our meeting website: https://lisacon4.phys.ufl.edu<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flisacon4…> NOTE: The LISA Consortium meeting is not an open meeting and access is restricted to LISA Consortium members and people working directly on the LISA study or LISA project at the space agencies or at our industrial partners. So please do not distribute this link widely but inform the people who need to know. We will work with Martin Hewitson to approve all registrations. Ira, Jeff, Paul, Martin: Please distribute the link among your LISA team members at the space agencies and your industrial partners at your discretion. All of them are certainly more than welcome. But I don’t have a good list to reach them. The registration fee will be paid through eventbrite, a platform the University has chosen to handle financial transactions that involve third party credit cards (your credit cards). Just in case you are irritated by that. Best regards Paul, Peter, John, Simon, and me Guido Mueller Professor of Physics University of Florida

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Change of job and email address
by Ian Hinder 27 Feb '19

27 Feb '19

Hi all, Sorry for the long absence from the list! In November, I started a new job at University of Manchester where I am now employed as a Research Software Engineer, working on a variety of research computing projects across the university, mostly focused on HPC. I will try to keep up with the ET a little, though obviously not as much as before. Please update your address books! ian.hinder(a)manchester.ac.uk<mailto:ian.hinder@manchester.ac.uk>. My AEI email address will stop working at the end of February. -- Ian Hinder Research Software Engineer University of Manchester, UK

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First LISA Waveform Working Group Workshop
by Witek, Helvi 26 Feb '19

26 Feb '19

Dear all, the first stand-alone meeting of the LISA Waveform working group (WavWG) will take place at the AEI Potsdam from 13 - 15 May 2019. The WavWG is dedicated to the development of waveform templates for the LISA mission and connects the broader scientific community to the LISA Consortium. As such, the WavWG coordinates efforts to model a broad spectrum of gravitational wave sources, establishing links with LISA’s astrophysics, cosmology, fundamental physics and simulation working groups, and bridge between communities employing different methodologies to prepare waveforms. This meeting is the first stand-alone meeting of the WavWG and aims at getting together leading international experts and young scientists to identify pressing tasks concerning LISA waveform modelling in its broadest sense and to foster new international collaborations. The meeting will have few talks per day and provide ample time for discussions. While the WavWG is part of the LISA Consortium, you do not need to be in the Consortium to attend. You can find additional information here:. https://workshops.aei.mpg.de/lisawavwg/ https://hyperspace.uni-frankfurt.de/2019/02/20/lisa-waveform-working-group-… The registration will end on *30 April 2019*. We have limited funds available to support PhD students. Should you require financial support, please follow the instructions on our website and apply until *30 March 2019*. Best wishes, Deirdre Shoemaker, Maarten van de Meent, Niels Warburton, Helvi Witek (Co-chairs LISA Waveform Working Group) =========================================== Dr. Helvi Witek Royal Society University Research Fellow Theoretical Particle Physics and Cosmology Department of Physics King's College London ===========================================

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meeting minutes for 2019-02-21
by Haas, Roland 21 Feb '19

21 Feb '19

Present: Roland, Steve, Sam, Bill, Chris, Zach, Helvi, Antoni, Future of svn.cactuscode.org [SB] - suggest to check access log - only thing hosted there that we know to be still in use is website source for cactuscode.org and CarpetHDF5 visit reader - repositories should / must be moved to some other hosting service before ET release planning [RH] * release team - Steve - Roland - Helvi - Peter - Sam * release goals ** BNS gallery example - no update ** WVU_Analysis / WVU_Diagnostics status - Zach has been adding missing pieces to thorn - Add thorns to master thornlist of manifest repo - Tests are still missing, Zach is trying to obtain tiny ID dataset, most thorns could use more generic data though - Zach is looking for a place to put example parfiles ** Proca / Lean status - Lean has example parfiles that could go to Cactus/par - thorns are in thornlist - removed SIMD vectorization which caused issues with Intel 17 / 18 compilers on Stampede2. See https://bitbucket.org/einsteintoolkit/tickets/issues/2101/ ** release relevant tickets https://bitbucket.org/einsteintoolkit/tickets/issues?milestone=ET_2019_02&m… - sqrt() issue on AVX512 https://bitbucket.org/einsteintoolkit/tickets/issues/2219/fix-sqrt-for-avx5… should be fixed. The pull request contains more than just the bugfix. Bugfix commit is here: https://bitbucket.org/cactuscode/cactusutils/commits/5dea378d702207d771e644… Stale example parfiles * suggestion to at least run the example parfiles through cactus_sim -S to test that the parfile are at least parsable * could be made part of the jenkins tests Workshop at RIT - no updates unanswered question on mailing list / open tickets sorted by update time - no unanswered question on mailing list 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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Meudon_Mag_NS gives segmentation fault
by Lorenzo Sala 19 Feb '19

19 Feb '19

Dear EinsteinToolkit users, I am having some trouble in using the thorn Meudon_Mag_NS. In order to run the parameter file "bbig.par" (in the par directory), I have to remove every reference to the thorn ADMConstraints and, moreover, the thorn itself is activated as ID_Mag_NS instead of Meudon_Mag_NS. However, even after fixing the errors in the parameter file, I'm given back a segmentation fault, as you can see in the attached file. If you have any suggestions, please let me know. Thanking you in advance, Lorenzo Sala

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Cactus Building Issue
by Rodriguez, Shanshan 15 Feb '19

15 Feb '19

Hello, I’m a new user of ETK and trying to follow the tutorial to set up Cactus. I ran into this problem building Cactus and hope you could help me resolve it. Here is the commend I’m stuck at: %cd $cactus_dir !time ./simfactory/bin/sim build -j2 --thornlist=thornlists/einsteintoolkit.th<http://einsteintoolkit.th> Where I got an error message at the end: checking whether the C compiler (gcc-mp-7 -g -std=c11 -lgfortran) works... no configure: error: installation or configuration problem: C compiler cannot create executables (see configs/<configname>/config-data/config.log for details). Error reconfiguring sim-config make: *** [sim-config] Error 2 I’m attaching the config, log file here. Could you suggest what I should do to fix this? Thank you so much!! Best, Shanshan Rodriguez —————————————————————— Shanshan Rodriguez Assistant Professor of Physics 1034 Noyce Science Center Department of Physics Grinnell College Grinnell, IA 50112 Email: rodriguezs(a)grinnell.edu<mailto:rodriguezs@grinnell.edu>

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Choose Self-defined Output Results Directory
by Steve Hawk 15 Feb '19

15 Feb '19

Hello: As a newer to Einstein Toolkit, I have successfully finished and executed the example file in the server following the link: https://github.com/nds-org/jupyter-et/blob/master/CactusTutorial.ipynb. But I have a question about deciding the simulation output directory，how can l give the self-defined output directory for storing the simulation results. Is there any files contents or commands inside ET that could define the output directory by myself, or any documentations clarifying how the Einstein Toolkit decide the IO directory? Maybe it is a simple question, but I really don’t want to mess the common folders up too much, since I need to work out some simulations about NR in the group’s server. Thanks a lot ! Best regards, Hawk Steve

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meeting minutes for 2019-02-14
by Haas, Roland 14 Feb '19

14 Feb '19

Present: Steve, Helvi. Roland, Chris, Sam, Bill, Zach, ET release planning * BNS gallery example ** No update * WVU_Analysis status ** No current update, Zach plans to get back to it in the very short term. * Proca / Lean status ** Peter identified some issue for OMP simd pragmas with Intel 17/18 compilers ** Helvi checked that tests pass with -O0 and has access to stampede2 that lets her try and track this down ** Helvi and Roland saw an bug in output (seem like CarpetIOASCII) in the Lean Schwarzschild test where the number of data points output is incorrect * release relevant tickets ** no update Steve provided an update an update on the status of the PreSync work. Steve, Roland and Sam worked in the presync code and now have some test suites using mesh refinement working. This will not go into this release but possible the one after. ET tutorial server volunteers needed * We are looking for person(s) interested in creating a HTML page for signup for the tutorial server which can be started as a copy of the new user registration page https://einsteintoolkit.org/join.html * A second page would be needed to serve as a webhook for bitbucket ticket creation / changes: https://bitbucket.org/einsteintoolkit/tickets/issues/2225/bitbucket-does-no… * If interested please contact the maintainers maintainers(a)einsteintoolkit.org unanswered question on mailing list / open tickets sorted by update time * one unanswered question: http://lists.einsteintoolkit.org/pipermail/users/2019-February/006753.html 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://keys.gnupg.net.

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