########################################### Table of Contents ########################################### 1. Conferences 1.1. Central European Relativity Seminar 11, Vienna, Austria 1.2. Mathematical Perspectives of Gravitation beyond the Vacuum Regime: Online workshop 1.3. Doubly Special Relativity 2020 (online meeting) 1.4. MW-Gaia Workshop: Galactic Centre and Inner Galaxy, Heidelberg, Germany (virtual) 1.5. Geometric Foundations of Gravity 2021, Tartu, Estonia 2. Jobs 2.1. FAIR4HEP Postdoctoral Researcher in AI and the CMS Experiment, La Jolla, California, USA 2.2. Postdoctoral position in high energy theory, Lyon, France 2.3. 3-year postdoc position in Qubits and Spacetime Unit, Okinawa, Japan 2.4. PhD Position - Gravitational Wave Probes of Dark Matter, Frankfurt, Germany 2.5. Postdoctoral Position in Artificial Intelligence and High Energy Physics, Urbana, Illinois, USA 2.6. Postdoctoral Researcher in gravitational wave data analysis and searches, Utrecht, The Netherlands 2.7. postdoc in the Astroparticle Physics group at SISSA, Trieste, Italy 2.8. Postdocs at the Institute for Fundamental Physics of the Universe, Trieste, Italy 2.9. Post-doctoral position in Gravitational Wave data analysis, Louvain, Belgium 2.10. ERC-funded postdoc position(s) in Relativistic Theoretical Astrophysics, Frankfurt, Germany 2.11. ERC-funded PhD position in Relativistic Theoretical Astrophysics, Frankfurt, Germany 2.12. Postdoc opportunity on gravitational wave physics, Valencia, Spain 2.13. Postdoc position in theoretical physics, Tartu, Estonia 2.14. Postdoc position in gravitational wave astrophysics, Guelph, Canada 2.15. Dennis Sciama Research Fellow in Cosmology at Institute of Cosmology and Gravitation, Portsmouth, UK 3. News 3.1. SageMath 9.2 is out 3.2. GRG Collection and Living Review on "Binary neutron star mergers" 3.3. Experimental Results - New Open Access Journal 3.4. The Twenty-First Release of the Einstein Toolkit ============================================== 1. Conferences ============================================== 1.1. Central European Relativity Seminar 11, Vienna, Austria --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/02/central-european-relativity-s... Starting: 2021-02-11 to 2021-02-13 Location: Vienna, Austria Additional Information: https://www.univie.ac.at/cers/cers11/index.html Contact: piotr.chrusciel[AT]univie.ac.at The Vienna meeting will be the eleventh seminar of a series designed to provide a forum for younger researchers to present their work, and to expand their research horizons, in all topics of research in general relativity. While the main geographical basin of attraction is Austria, the Czech Republic, Hungary, Poland and Germany, we welcome researchers from all countries. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.2. Mathematical Perspectives of Gravitation beyond the Vacuum Regime: Online workshop --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/16/mathematical-perspectives-of-... Starting: 2021-02-22 to 2021-02-26 Location: Online Additional Information: https://www.esi.ac.at/events/e406/ Contact: jeremie.joudioux[AT]aei.mpg.de Organizers: Hakan Andreasson, David Fajman, Jeremie Joudioux, Todd Oliynykk The main aim of the workshop is to drive progress by connecting researchers working on different matter models and by advertising open problems that can serve as an entry point for researchers from other areas. In particular, we want to bring together people who work on {different types of} relativistic matter with {each other and with} those who work on non-relativistic matter. We believe large benefits are to be gained from increased interactions that would hopefully lead to exchanges of ideas and techniques that could be used to spur progress on outstanding problems in both areas. This workshop is part of a larger program scheduled to take place at the Erwin Schrodinger Institute, in Vienna, from January 31st to March, 11th, 2022. Registration for the online workshop is mandatory. ��Please contact one of the organizers to register. Note that this workshop is primarily intended for researchers in related fields. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.3. Doubly Special Relativity 2020 (online meeting) --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=17700 Starting: 2020-12-14 to 2020-12-16 Location: Additional Information: https://indico.capa.unizar.es/event/10/ Contact: dsr20.meeting[AT]gmail.com It's now 20 years since the first Doubly Special Relativity papers appeared on ArXiv. Several research groups have worked on DSR-relativistic models, leading to significant progress, but some grey areas remain on the conceptual side and additional phenomenological avenues are much needed. The meeting "DSR20" (an online meeting, using zoom) intends to be an opportunity for an exchange of ideas on these matters. DSR20 will be held from december 14 to december 16 and it will be scheduled so to allow colleagues in different parts of the world to attend at least some of the sessions. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.4. MW-Gaia Workshop: Galactic Centre and Inner Galaxy, Heidelberg, Germany (virtual) --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=17702 Starting: 2021-02-10 to 2021-02-12 Location: Virtual (hosted in Heidelberg, Germany) Additional Information: https://www.zah.uni-heidelberg.de/mw-gaia2021 Contact: MW-Gaia-HD[AT]zah.uni-heidelberg.de The inner regions of our Milky Way are dominated by the Galactic bar and a classical bulge. The barred potential causes gas to flow inwards and form stars in the central few 100 parsecs. Over time this process may have built up the nuclear stellar disk, also found at these radii. At the very centre, the nuclear star cluster surrounds the Galactic supermassive black hole, Sgr A*. The larger inner bulge region also contains the highest-density parts of the Milky Way's stellar halo, and perhaps an classical bulge component. The next Gaia data release EDR3 will be released on Dec. 3, 2020, and will be based on 34 months of observations. Compared to DR2 improvements in completeness and astrometry (20% in parallaxes, factor of two in proper motion) will be provided. Additionally, more information on the parallax zero point will be included and the basis of the Celestial Reference Frame (CRF) will be extended to 1.5 million objects, a factor of three more. During this 3 day workshop in (virtual) Heidelberg, we will focus on the impact of the ultra-precise Gaia astrometry on our understanding of the structure and dynamics of the Galactic bar and bulge region including the interrelation with the inner halo, the nuclear stellar disc and the central star cluster. Chemical enrichment, ages and the assembly history will also be covered. The celestial reference frame, zero points of parallaxes and proper motions, as well as questions of fundamental physics will be discussed. Also first results based on EDR3 are expected. The format of the workshop is based on invited key presentations and contributed talks, ePosters, a practical hands-on session for EDR3, and dedicated discussions. Topics Covered Gaia EDR3: overview, completeness Gaia Ref Frame: zero points in parallax and proper motion, fundamental physics and relativistic effects using Gaia and VLBI, Sgr A* and testing GR Bulge, Bar and Inner Halo: kinematics, dynamics, mass distribution Bulge, Bar, Inner Halo: metallicity-orbit distribution and stellar ages Bulge, Bar, Inner Halo: critical discussion on stellar ages in Bulge, assembly history from (hydro-)dynamical and cosmological simulations Nuclear Disk, Gas Inflow and Star Formation +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.5. Geometric Foundations of Gravity 2021, Tartu, Estonia --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/26/geometric-foundations-of-grav... Starting: 2021-06-28 to 2021-07-02 Location: Tartu, Estonia Additional Information: http://geomgrav.fi.ut.ee/conf/geomgrav2021/ Contact: geomgrav[AT]ut.ee Geometric Foundations of Gravity 2021 is a conference dedicated to the geometric foundations of gravity theories that will take place on June 28 - July 2, 2021 in Tartu, Estonia. This conference is a continuation of a series of earlier conferences and workshops on the same subject. The main topics include: - Extensions of General Relativity (metric affine gravity, Poincare gauge gravity, scalar/vector/tensor gravity, teleparallel gravity, massive gravity, bi-metric gravity, ...) - Astrophysics in Extended Gravity (black holes, ordinary/neutron/boson/grava stars, gravitational waves, strings, wormholes, binary systems, ...) - Cosmology in Extended Gravity (dynamical system analysis, observations and constraints, dark energy, dark matter, inflation, early universe, galaxies, ...) - Beyond Lorentzian Geometry in Classical and Quantum Gravity (doubly/deformed relativity, standard model extension, Hamilton geometry, Finsler geometry, ...). At the moment the conference is planned under the assumption that by June 2021 travelling is safely possible again. Should the corona pandemic forbid travelling the conference will be shifted to hybrid or pure online event. An up to date list of invited speakers, the registration procedure, participants and all further details can be found on http://geomgrav.fi.ut.ee/conf/geomgrav2021/ The conference is organized by the gravity research group at the Laboratory of Theoretical Physics, Institute of Physics, University of Tartu Sebastian Bahamonde Jorge Gigante Valcarcel Manuel Hohmann Laur Jarv Tomi Koivisto Martin Krssak Christian Pfeifer Joao Luis Rosa Margus Saal Aneta Wojnar +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ============================================== 2. Jobs ============================================== 2.1. FAIR4HEP Postdoctoral Researcher in AI and the CMS Experiment, La Jolla, California, USA ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=17670 Deadline: 2020-12-01 Location: La Jolla, California, USA Additional Information: https://academicjobsonline.org/ajo/jobs/17359 Contact: duarte-pd-recruit[AT]physics.ucsd.edu The experimental high energy physics (HEP) group at the University of California San Diego (UCSD) invites applications from outstanding candidates for the position of postdoctoral researcher to work on the CMS experiment and to develop and apply findable, accessible, interoperable, and reusable (FAIR) principles to artificial intelligence (AI) models and data in high energy physics. Transformational progress in AI has been driven by the ubiquity of large datasets such as ImageNe0t. Within HEP, creating and publishing open, realistic, and FAIR datasets can shed light on the unique challenges in this domain and usher in new groundbreaking and physics-inspired ideas in AI. FAIR4HEP is a joint DOE-funded venture between UIUC, MIT, UMN, and UCSD. The goal of the multi-institution and interdisciplinary project is to curate data sources from HEP, develop software frameworks to automatically train, evaluate, and compare benchmark AI models for charged particle tracking, Higgs boson identification, detector calibration, event reconstruction, and more, and publish sharable AI models and data following FAIR principles. The successful candidate is expected to take a leading role in these efforts as well as in the CMS experiment. The postdoctoral researcher will be affiliated with UCSD and mentored by Prof. Javier Duarte, but is encouraged to collaborate with all partner institutions. The CMS group at UCSD is involved in developing machine learning algorithms for event reconstruction like the particle-flow algorithm, creating tools, like hls4ml, for fast inference of neural networks in FPGAs and other heterogeneous computing resources with applications to the Level-1 trigger, and searches for exotic long-lived particles and measurements of high-transverse-momentum Higgs boson decays. The candidate will have the opportunity to join and lead these efforts. Ambitious applicants from diverse backgrounds and are encouraged to apply. A PhD in physics, statistics, computer science, machine learning, data science, or related fields is required. Prior experience in software development and machine learning is advantageous, but not essential. Complete applications should be sent to duarte-pd-recruit[AT]physics.ucsd.edu and must include - Cover letter (no more than 1 page); - CV (1-2 pages recommended, but longer accepted); - Statement of research interests (no more than 2 pages); - List of publications; - Three reference letters. The deadline for the receipt of the application is December 1, but the search will continue until the position is filled. UCSD is an equal opportunity/affirmative action employer with a strong institutional commitment to excellence through diversity. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.2. Postdoctoral position in high energy theory, Lyon, France ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=17682 Deadline: 2020-12-14 Location: Lyon, France Additional Information: https://www.universite-lyon.fr/research/the-investments-for-the-future-progr... Contact: henning.samtleben[AT]ens-lyon.fr The Physics Laboratory at Ecole Normale Superieure de Lyon (LPENSL) and the Institut de Physique des Deux Infinies (IP2I), are seeking applications for a joint postdoctoral fellow position in theoretical high energy physics, financed by the LabEx "Institut des origines de Lyon (LIO)". The position will involve studies of models in string theory and quantum gravity including, but not limited to, topics such as holography and AdS/CFT, supergravity, string/M-theory and matrix models. The appointment is for two years. Applicants must hold a PhD or equivalent degree in physics by start date, and have research experience in theoretical high energy physics. The application should include a curriculum vitae, a research statement and three reference letters sent separately. All documents should be sent by email to the following address: lio-postdoc-search.physique[AT]ens-lyon.fr Research applications will start being reviewed on December 14, until the position is filled. The theoretical physics research activities of the LPENSL and IP2I groups cover a large range of subjects in quantum gravity, string/M-theory and supergravity. More information can be found at: https://www.ip2i.in2p3.fr/teams/theory/?lang=en#ancre-FORM-TH-PHYS http://www.ens-lyon.fr/PHYSIQUE/teams/physique-theorique/research-topics/mat... http://www.ens-lyon.fr/PHYSIQUE/teams/physique-theorique/research-topics/mat... +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.3. 3-year postdoc position in Qubits and Spacetime Unit, Okinawa, Japan ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=17684 Deadline: 2020-11-15 Location: Okinawa, Japan Additional Information: https://academicjobsonline.org/ajo/jobs/17513 Contact: quast.oist[AT]gmail.com One 3-year postdoctoral position will become available in September 2021 in the Qubits and Spacetime Unit at Okinawa Institute of Science and Technology (www.oist.jp) led by Philipp Hoehn. The research of the unit lies broadly at the interface of quantum gravity, quantum information and foundations, focusing on general questions in an around quantum gravity. Current research interests include studying dynamics and observables in a diffeomorphism-invariant context, using quantum reference systems to explore a quantum version of general covariance, equilibrium and non-equilibrium spacetime thermodynamics, the interplay of quantum correlations and spacetime geometry, entanglement in gauge systems, as well as the emergence of classicality from within quantum theory, especially in the presence of chaos. For further information on some of these topics, see https://groups.oist.jp/quast. Candidates with an interest in any of these or related topics are encouraged to apply. OIST currently harbors three further units in quantum gravity or related topics in mathematical physics, headed by Shinobu Hikami, Yasha Neiman and Reiko Toriumi. Furthermore, the institute regularly hosts international workshops, seminars and visitors in this area, providing for a stimulating research environment. The unit will provide support for traveling and hosting collaborators. Responsibilities: The successful candidate will contribute to the research program of the Qubits and Spacetime Unit, but is also encouraged to carry out self-designed projects. Active participation in group seminars and meetings is expected, as well as in assisting with their organization. The successful candidate may also contribute to mentoring students. Qualifications: - Completed PhD in theoretical physics or mathematics by the time of employment. - Background in one or several of the following topics: quantum gravity, quantum information, quantum field theory, quantum foundations, quantum many-body physics or mathematical physics. - Fluency in English. Starting Date: Fall 2021 Term and Working hours: Full-time, fixed term appointment for 3 years. Compensation and Benefits: We pay an internationally competitive salary, which is raised upon completion of every additional year after the PhD award. A housing allowance of up to 80% of the rent complements the salary. Additional benefits: - Relocation and commuting allowances - Annual paid leave and summer holidays - Health insurance, welfare pension insurance and worker's accident compensation insurance How to Apply: Apply by uploading your Submission Documents through Academic Jobs Online under the link https://academicjobsonline.org/ajo/jobs/17513 For further information please see https://groups.oist.jp/quast or contact Philipp Hoehn under quast.oist[AT]gmail.com. Submission Documents: - Cover letter - Research statement including summary of past achievements and future research plans - Curriculum vitae including publication list - Three letters of reference Application Due Date: Applications will be screened as they come in. Preferably they should be received by December 15th, 2020 The Okinawa Institute of Science and Technology Graduate University (OIST; see www.oist.jp) is a dynamic new graduate university of science and technology in Okinawa Prefecture, Japan. The university is located on 85 hectares of protected forestland overlooking beautiful shoreline and coral reefs. The campus is striking architecturally, and the facilities are outstanding (OIST campus video tour). There are no academic departments, which facilitates multidisciplinary research. Outstanding resources and equipment are provided and managed to encourage easy access and collaboration. English is the official language of the University, and the university research community is fully international, with more than 50 countries represented. OIST is rapidly gaining recognition in the worldwide academic community as a model for excellence in education and research. * OIST Graduate University is an equal opportunity, affirmative action educator and employer and is committed to increasing the diversity of its faculty, students and staff. The University strongly encourages women and minority candidates to apply. * Information provided by applicants or references will be kept confidential, documents will not be returned. All applicants will be notified regarding the status of their applications. * Please view our policy for rules on external professional activities (https://groups.oist.jp/acd/information-disclosure/). +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.4. PhD Position - Gravitational Wave Probes of Dark Matter, Frankfurt, Germany ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=17691 Deadline: 2020-12-06 Location: Frankfurt, Germany Additional Information: https://inspirehep.net/jobs/1830700 Contact: sagunski[AT]itp.uni-frankfurt.de The Institute of Theoretical Physics at Faculty of Physics at Goethe University Frankfurt, Germany, invites applications for a PHD STUDENT POSITION (all genders welcome) (E13 TV-G-U, 65%-part-time) at the interface of theoretical gravitational wave physics, particle physics and cosmology, with a starting date as soon as possible. The duration of the position is limited to 3 years. The salary grade is based on the job characteristics of the collective agreement (TV-G-U) applicable to Goethe University. The position is funded by the DFG Collaborative Research Center CRC-TR 211 "Strong-interaction matter under extreme conditions". The salary grade is based on the job characteristics of the collective agreement (TV-G-U) applicable to Goethe University. JOB DESCRIPTION: The successful candidate will join the newly set-up group of Prof. Dr. Laura Sagunski and pursue cutting-edge research at the interface of gravitational wave physics, particle physics and cosmology to explore the particle nature of dark matter with gravitational waves. Possible topics include for example exploring dark matter effects on gravitational wave signals from binary mergers (dark matter density spikes, dark fifth forces) or gravitational waves from phase transitions in the Early Universe in extensions of the Standard Model of particle physics. The prospective candidate will closely interact with the other members of the CRC-TR 211 and the Astrophysics Groups at the Institute of Theoretical Physics and at the Frankfurt Institute of Advanced Studies (FIAS). QUALIFICATION REQUIREMENTS: The ideal candidate has a Master's degree in physics or astrophysics, a strong background in theoretical gravitational wave physics, particle physics and/or cosmology, and solid knowledge of at least on programming language (Python, C++). Experience with general-relativistic numerical simulations is of advantage but not a prerequisite. APPLICATION MATERIAL AND DEADLINE: Applications, including a cover letter, curriculum vitae, a short research summary and out-look, and a copy of the Master's certificate, should be sent electronically to: Mrs Astrid Steidl (steidl@itp.uni-frankfurt.de) and CC-ed to sagunski[AT]itp.uni-frankfurt.de Applicants should also arrange for two letters of recommendation to be sent separately to the e-mail addresses above. The application deadline is Dec 06, 2020. Goethe University is an equal-opportunity employer and is committed to increasing the number of women in research and teaching. Qualified female researchers are therefore especially encouraged to apply. Severely handicapped applicants with equal qualification and aptitude will be given preferential consideration. We prioritize diversity and are committed to creating an inclusive environment for everyone. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.5. Postdoctoral Position in Artificial Intelligence and High Energy Physics, Urbana, Illinois, USA ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=17692 Deadline: 2020-12-01 Location: Urbana, Illinois, USA Additional Information: https://ai.ncsa.illinois.edu/news-events/2020/10/postdoctoral-researcher/ Contact: ai[AT]ncsa.illinois.edu The NCSA Center for Artificial Intelligence Innovation and the High Energy Physics Group in the Department of Physics at the University of Illinois at Urbana-Champaign (UIUC) invite applications for the position of postdoctoral researcher. The selected candidate will be mentored by an interdisciplinary team of researchers - Eliu Huerta, Daniel S. Katz, Vlad Kindratenko, Mark Neubauer, and Zhizhen Zhao - at the interface of physics, artificial intelligence (AI), computer and information science, open science, and scientific software and data to lead the definition and implementation of findable, accessible, interoperable, and reusable (FAIR) principles to artificial AI models and data in the context of high energy physics. FAIR4HEP is a joint DOE-funded venture between UIUC, MIT, UMN, and UCSD. The postdoctoral researcher is encouraged to collaborate with all partner institutions. At the University of Illinois the selected candidate will lead research activities towards making data and models available, around the definition and implementation of FAIR principles for data and models, and the combination of accelerated computing and scientific visualization to identify novel connections between data and models. Available resources for this work include the Hardware Accelerated Learning deep learning cluster, the Delta supercomputer, and multiple visualization teams at NCSA. The selected candidate will be encouraged to participate in internship opportunities offered by Fortune 50 companies affiliated with the NCSA Industry program. The University of Illinois is a member of the ATLAS experiment at CERN's Large Hadron Collider. Our ATLAS group contributed to the Higgs boson discovery and is actively pursuing discovery of new physics through analysis of LHC data. This pursuit includes the development and application of AI-based tools that seek to maximize our discovery potential. The successful candidate is expected to strengthen our efforts by leading the implementation of FAIR principles for HEP data and AI models that connect strongly to our ATLAS analysis efforts and broadly impact the potential for discovery in particle physics. Ambitious applicants from diverse backgrounds and minorities are particularly encouraged to apply. A PhD in physics, statistics, computer science, machine learning, data science, or related fields is required. Prior experience in software development and machine learning is advantageous, but not essential. Submit your application to ai[AT]ncsa.illinois.edu. Complete applications must include: Cover letter (no more than 1 page); CV (1-2 pages recommended, but longer accepted); Statement of research interests (no more than 2 pages); List of publications; Three reference letters. The deadline for the receipt of the application is December 1, 2020, but the search will continue until the position is filled. The University of Illinois is an equal opportunity/affirmative action employer with a strong institutional commitment to excellence through diversity. The University of Illinois conducts criminal background checks on all job candidates upon acceptance of a contingent offer. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.6. Postdoctoral Researcher in gravitational wave data analysis and searches, Utrecht, The Netherlands ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=17698 Deadline: 2021-01-03 Location: Utrecht, The Netherlands Additional Information: https://www.uu.nl/en/organisation/working-at-utrecht-university/jobs/postdoc... Contact: s.e.caudill[AT]uu.nl Job Description The Institute for Gravitational and Subatomic Physics (GRASP) at Utrecht University invites applications for a Postdoctoral Researcher in gravitational-wave data analysis and searches. As the successful candidate you will work in the gravitational waves group of Dr Sarah Caudill and Professor Chris Van Den Broeck, on gravitational wave observations of coalescing binary neutron stars and black holes, with a view on the effects of precession and higher-order modes. You will be a member of the Virgo Collaboration, which together with the LIGO Scientific Collaboration jointly analyses all data from the LIGO and Virgo interferometers. The group is also part of the LISA Consortium, and has been heavily involved in developing the science case for third-generation gravitational wave detectors such as Cosmic Explorer and Einstein Telescope. Qualifications Our successful candidate is ambitious and: * holds a PhD degree in Physics, Astronomy, or a related field; * has a background in programming and preferably some research experience; * has scientific writing skills; * has English collaboration and communication skills; * has the motivation to work in a multidisciplinary, international research team. Offer * a full-time position for 3 years; * a full-time gross salary ranging from EUR 2,790 to EUR 4,402 in scale 10; * benefits including 8% holiday bonus and 8.3% end-of-year bonus; * a pension scheme, partially paid parental leave, and flexible employment conditions based on the Collective Labour Agreement Dutch Universities (cao). In addition to the employment conditions laid down in the cao for Dutch Universities, Utrecht University has a number of its own arrangements. For example, there are agreements on professional development, leave arrangements and sports. We also give you the opportunity to expand your terms of employment yourself via the Employment Conditions Selection Model. This is how we like to encourage you to continue to grow. About the organisation The gravitational waves group at the Institute for Gravitational and Subatomic Physics (GRASP) currently consists of about 20 Researchers (senior Scientists, Postdocs, and PhD students), and is expected to expand further in the near future. The group brings together gravitational wave and particle physicists in an effort to study the strong nuclear force using a variety of observational and experimental channels, including gravitational wave measurements with the Virgo and LIGO detectors, multi-messenger astronomy, and heavy ion collisions in the Large Hadron Collider. We also have strong ties with Utrecht University's Institute for Theoretical Physics (e.g. through Dr Tanja Hinderer, Dr Elisa Chisari, and Dr Umut Gursoy), as well as with Nikhef, the National Institute for Subatomic Physics in Amsterdam, and there is vibrant collaboration with Researchers in the Netherlands and around the world. At the Faculty of Science there are 6 departments to make a fundamental connection with: Biology, Chemistry, Information and Computing Sciences, Mathematics, Pharmaceutical Sciences and Physics. Each of these is made up of distinct institutes which work together to focus on answering some of humanity's most pressing problems. More fundamental still are the individual research groups - the building blocks of our ambitious scientific projects. Utrecht University is a friendly and ambitious university at the heart of an ancient city. We love to welcome new scientists to our city - a thriving cultural hub that is consistently rated as one of the world's happiest cities. We are renowned for our innovative interdisciplinary research and our emphasis on inspirational research and excellent education. We are equally well-known for our familiar atmosphere and the can-do mentality of our people. This lively and inspiring academic environment attracts Professors, Researchers and PhD candidates from all over the globe, making both the university and the Faculty of Science a vibrant international community and wonderfully diverse. Additional information If you have any questions, please contact Dr Sarah Caudill (s.e.caudill[AT]uu.nl). Do you have a question about the application procedure? Please send an email to science.recruitment[AT]uu.nl Apply Everyone deserves to feel at home at our university. We welcome employees with a wide variety of backgrounds and perspectives. If you have the expertise and the experience to excel in this role, then simply respond via the "Apply now" button at the url! Please enclose: * your letter of motivation; * your curriculum vitae; * the names, telephone numbers, and email addresses of at least two references. If this specific opportunity isn't for you, but you know someone who may be interested, please forward the link to them. Please note: Due to the current situation regarding the Corona virus (COVID-19) the process of selection and interviews is subject to change. Initial interviews will most likely be conducted online. Some connections are fundamental - Be one of them The application deadline is 3 January 2021. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.7. postdoc in the Astroparticle Physics group at SISSA, Trieste, Italy ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/24/postdoc-in-the-astroparticle-... Deadline: 2020-12-19 Location: Trieste, Italy Additional Information: https://academicjobsonline.org/ajo/jobs/17595 Contact: barausse[AT]sissa.it The Astroparticle Physics group at SISSA in Trieste, Italy, invites applications for a postdoctoral research position to start in the Fall of 2021. The position is for two years, with a possible extension to a third year. Applications in the area of Cosmology, Gravitation Theory, Quantum Gravity Phenomenology, Particle Astrophysics and Phenomenology, and Neutrino Physics will be considered. SISSA (http://www.sissa.it/) promotes its activity within an international environment and in contact with the other institutions in the Trieste area. In particular, the postdoc will participate to the activities of the Institute for Fundamental Physics of the Universe (https://www.ifpu.it/), a new joint initiative of SISSA, the Abdus Salam International Center for Theoretical Physics (http://www.ictp.it/), INAF - Observatory of Trieste (http://www.oats.inaf.it/index.php/en/) and INFN - Trieste (https://www.ts.infn.it/en/). More information on the Astroparticle Physics group can be found here: http://www.sissa.it/app/. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.8. Postdocs at the Institute for Fundamental Physics of the Universe, Trieste, Italy ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/24/postdocs-at-the-institute-for... Deadline: 2020-12-15 Location: Trieste, Italy Additional Information: https://academicjobsonline.org/ajo/jobs/17577 Contact: barausse[AT]sissa.it The Institute for Fundamental Physics of the Universe (IFPU, www.ifpu.it/), Trieste, Italy, invites applications for several postdoctoral research positions to start in the Fall of 2021. The positions are for two years, with a possible extension to a third year. The research fields supported by the Institute are connected to the areas of: astroparticle physics, astrophysical probes of fundamental interactions, early Universe, gravitational wave astrophysics, structures in the Universe, theory and phenomenology of gravity. IFPU is a newly born institute, having started its activities in the academic year 2018-2019. It is a joint initiative of International School for Advanced Studies (SISSA, www.sissa.it/ap/ and www.sissa.it/app/), the Abdus Salam International Centre for Theoretical Physics (ICTP), the National Institute for Astrophysics (INAF; Observatory of Trieste) and the National Institute for Nuclear Physics (INFN; Trieste Section). The Institute aims at hosting and promoting a vigorous and innovative multi-disciplinary research program focused on investigating the fundamental laws of Nature under a Cosmological and Astrophysical perspective. Postdocs at IFPU work in close connections with staff members from the supporting institutions - about 30 researches in total - and also benefit from the extended visitor and research programs the Institute is hosting. Review of applications will begin on December 15, 2020 and continue until the positions are filled. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.9. Post-doctoral position in Gravitational Wave data analysis, Louvain, Belgium ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/25/post-doctoral-position-in-gra... Deadline: 2021-01-10 Location: Louvain-la-Neuve, Belgium Additional Information: https://cp3.irmp.ucl.ac.be/jobs/65 Contact: Giacomo.Bruno[AT]uclouvain.be The gravitational wave (GW) group of the University of Louvain (UCLouvain, Belgium), hosted at the Research Institute in Mathematics and Physics (IRMP, https://uclouvain.be/en/research-institutes/irmp/), is searching for an outstanding post-doctoral researcher to strengthen its data analysis activities related to the search for a stochastic gravitational wave background (SGWB). The IRMP physicists of UCLouvain conduct research in fundamental interactions and cosmology on the experimental and theoretical fronts. More than 100 physicists and mathematicians from all over the world currently work at the IRMP. The UCLouvain GW group is part of the Virgo Collaboration at the European Gravitational Observatory (EGO) and is active in searches for ultra-light dark matter, primordial black holes and an anisotropic SGWB. These searches are being performed in collaboration with theory specialists and make use of the IRMP computing center (2500 cores and 1400 TB), which is shared with LHC experiments and projects in theoretical particle physics and cosmology. The UCLouvain GW group is also involved in an instrumentation project for Virgo (exploitation of phase cameras) and participates in two research and development facilities, E-TEST and ETPF, funded by the EU through its Interreg Europe programme, aiming to prepare the EinsteinTelescope, which could be built at the frontier between Belgium, the Netherlands and Germany and start operations in the years 2030's. The selected candidate is expected to take a leading role in the data analyses carried out within the LIGO and Virgo SGWB group and make a bridge with the theorists working on models predicting specifc SGWB signatures. A secondary involvement in the other activities of the UCLouvain GW group (instrumentation for instance) can be discussed. The appointment is initially available for two years, and could possibly be extended to 3 years subject to availability of funds, which is expected at this time, and mutual satisfaction. Computing resources and support for travelling are excellent. Applications including a curriculum vitae, a list of publications, a brief statement of research interests and at least two recommendation letters from senior scientists should be submitted on-line, by 10 January 2020, at: https://cp3.irmp.ucl.ac.be/jobs/65 For more information, please, contact Giacomo Bruno (Giacomo.Bruno[AT]uclouvain.be) (data analysis) Christophe Ringeval (Christophe.Ringeval[AT]uclouvain.be) (theory) Joris Van Heijningen (Joris.Vanheijningen[AT]uclouvain.be) (instrumentation) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.10. ERC-funded postdoc position(s) in Relativistic Theoretical Astrophysics, Frankfurt, Germany ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/27/erc-funded-postdoc-positions-... Deadline: 2021-01-31 Location: Frankfurt am Main, Germany Additional Information: https://relastro.uni-frankfurt.de/ Contact: rezzolla[AT]itp.uni-frankfurt.de The group of Relativistic Theoretical Astrophysics in Frankfurt invites applications for one or more postdoctoral positions in Relativistic Theoretical Astrophysics. The position(s) is funded by the ERC Advanced Grant "JETSET" and will be part of a large-scale, long-term effort to study the dynamics of relativistic jets on different scales and physical regimes. Candidates should have a PhD in astrophysics, physics or applied mathematics. Knowledge and experience in modelling - either analytically or numerically - the electrodynamics of black holes is seen as a prerequisite. The successful applicant(s) will be part of an international research group at the Institute for Theoretical Physics at Frankfurt, Germany. Interests of the group span from the modelling of the physics of neutron stars and black holes, to fundamental issues in gravitational physics (https://relastro.uni-frankfurt.de/). Frankfurt am Main is a lively and international city, and Europe's financial center. The application should comprise a CV, a publication list, and a research summary and proposal. Applicants should also arrange for three letters of reference to be sent to the address below. Applications will have to be sent by 31.01.2021 for full consideration, but the search will remain open till the optimal candidate(s) is found. The position is initially for two years and can be extended - depending on successful performance and availability of funds. The expected starting date is 01.10.2021, but later appointments can be negotiated. Applications should be made electronically and sent to: Fr. Astrid Steidl: steidl[AT]itp.uni-frankfurt.de and to CC-ed to rezzolla[AT]itp.uni-frankfurt.de Goethe University is an equal-opportunity employer and is committed to increasing the number of women in research and teaching. Qualified female researchers are therefore especially encouraged to apply. Severely handicapped applicants with equal qualification and aptitude will be given preferential consideration. We prioritize diversity and are committed to creating an inclusive environment for everyone. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.11. ERC-funded PhD position in Relativistic Theoretical Astrophysics, Frankfurt, Germany ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/27/erc-funded-phd-position-in-re... Deadline: 2020-01-31 Location: Frankfurt am Main, Germany Additional Information: https://relastro.uni-frankfurt.de/ Contact: rezzolla[AT]itp.uni-frankfurt.de The group of Relativistic Theoretical Astrophysics in Frankfurt invites applications for one PhD position in Relativistic Theoretical Astrophysics. The position is funded by the ERC Advanced Grant "JETSET" and will be part of a large-scale, long-term effort to study the dynamics of relativistic jets on different scales and physical regimes. Candidates should have a MSc degree in astrophysics, physics or applied mathematics. Candidates with knowledge and experience in modelling the electromagnetic emission from short GRBs will be particularly favoured. Research experience with simulations in numerical relativity, relativistic hydrodynamics and MHD is seen as an important advantage. The successful applicant will be part of an international research group at the Institute for Theoretical Physics at Frankfurt, Germany. Interests of the group span from the modelling of the physics of neutron stars and black holes, to fundamental issues in gravitational physics (https://relastro.uni-frankfurt.de/). Frankfurt am Main is a lively and international city, and Europe's financial center. The application should comprise a CV, a publication list, and a research summary and proposal. Applicants should also arrange for three letters of reference to be sent to the address below. Applications will have to be sent by 31.01.2021 for full consideration, but the search will remain open till the optimal candidate(s) is found. The position is for three years and can be extended if necessary. The expected starting date is 01.10.2021, but later appointments can be negotiated. Applications should be made electronically and sent to: Fr. Astrid Steidl: steidl[AT]itp.uni-frankfurt.de and to CC-ed to rezzolla[AT]itp.uni-frankfurt.de Goethe University is an equal-opportunity employer and is committed to increasing the number of women in research and teaching. Qualified female researchers are therefore especially encouraged to apply. Severely handicapped applicants with equal qualification and aptitude will be given preferential consideration. We prioritize diversity and are committed to creating an inclusive environment for everyone. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.12. Postdoc opportunity on gravitational wave physics, Valencia, Spain ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=20576 Deadline: 2020-12-23 Location: Valencia, Spain Additional Information: http://innova.gva.es/es/web/ciencia/a-programa-i-d-i1 Contact: j.antonio.font[AT]uv.es The Virgo Group at the University of Valencia (VVG) welcomes applications for a two-year postdoctoral position in Gravitational Wave Physics within the framework of the "Program for the promotion of scientific research, technological development, and innovation" from the Valencian Research Agency. http://innova.gva.es/es/web/ciencia/a-programa-i-d-i1 Candidates are required to have a PhD degree (obtained after January 1st, 2016) and an excellent CV. A gross salary of 35.000 euros per year is anticipated. Interested candidates are encouraged to contact j.antonio.font[AT]uv.es. The application deadline is December 23rd, 2020. VVG website: https://www.uv.es/virgogroup/index.html +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.13. Postdoc position in theoretical physics, Tartu, Estonia ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/28/postdoc-position-in-theoretic... Deadline: 2021-01-04 Location: Tartu, Estonia Additional Information: http://geomgrav.fi.ut.ee/jobs/ Contact: geomgrav[AT]ut.ee The Laboratory of Theoretical Physics at the Institute of Physics of the University of Tartu, Estonia is looking for candidates to apply for a 2-year postdoctoral position. The research focus lies on: - mathematical foundations of gravity, - modifications to the geometry of spacetime, - gravity theories based on Finsler, Cartan, Weizenboeck or Riemann-Cartan geometry, - gravity theories including multiple metrics, - gravity theories including torsion, - (multi-)scalar-tensor and related gravity theories, - phenomenology of modified gravity, including gravitational waves, black holes, galaxies, - cosmological aspects of modified gravity, - relativistic quantum information, aiming at including gravity by employing quantum field theory on curved spacetime, - nonlocality in quantum field theories, - effective approaches for heavy quark physics. The position depends on external funding and the applications will be processed in two stages. In the first stage, all applications will be reviewed by the Laboratory of Theoretical Physics at the University of Tartu. Then the selected candidates and the University of Tartu will apply for funding. The final decision on the funding will be made by the respective agencies. The position will be held in conjunction with the Estonian centre of excellence in research "The Dark Side of the Universe" (TK133) and the grant "Gauge gravity: unification, extensions and phenomenology" (PRG356), as well as aligned with the COST Action "Quantum Gravity Phenomenology in the multi-messenger approach" (QGMM). The postdoctoral grant is expected to amount to 51000 EUR per year (40800 EUR direct research costs and 10200 EUR overhead for the host institution). Applicants must have a PhD degree or equivalent, awarded not earlier than 01 February 2016, and not later than 31 August 2021. Applications for the postdoctoral position must include: - curriculum vitae, - diploma of PhD degree or equivalent, - research proposal of up to five pages, - list of publications, - two letters of recommendation (to be sent separately). The deadline for the postdoctoral application is Monday, 04 January 2021, 05:59 GMT. All applications for the aforementioned position must be submitted electronically via the form on the linked homepage. All documents from the applicant, except for the recommendation letters, must be combined into a single PDF file of at most 8 MB size. The recommendation letters must be uploaded separately, and also in the PDF format. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.14. Postdoc position in gravitational wave astrophysics, Guelph, Canada ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=20584 Deadline: 2021-01-15 Location: Guelph, Canada Additional Information: https://www.physics.uoguelph.ca/astrophysics-and-gravitation Contact: hyang10[AT]uoguelph.ca The Astrophysics and Gravitation group at the University of Guelph invites applicants for a two-year postdoctoral position in gravitational-wave astrophysics. This position is supported by the NSERC fund of Canada. Candidates should have a PhD in physics - preference will be given to applicants with research experience in black hole astrophysics, compact-object dynamics, and/or gravitational-wave data analysis. The successful applicant will be a part of the strong-gravity research group at the University of Guelph and the Perimeter Institute. The applicant will have opportunities to interact with local researchers such as Dr. East, Dr. Lehner, Dr. Poisson, Dr. Siegel, Dr. Yang, etc., and help group efforts in international collaboration(s) such as the LISA Consortium. The application should comprise a CV, a publication list, a research statement, and two reference letters. All application material should be sent to hyang10[at]uoguelph.ca. The application deadline is January 15, 2021. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.15. Dennis Sciama Research Fellow in Cosmology at Institute of Cosmology and Gravitation, Portsmouth, UK ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/30/dennis-sciama-research-fellow... Deadline: 2020-12-23 Location: Portsmouth, UK Additional Information: http://www.icg.port.ac.uk/ Contact: icg-recruitment[AT]port.ac.uk We announce our seventh Dennis Sciama Postdoctoral Research Fellowship competition at the Institute of Cosmology and Gravitation (ICG) at the University of Portsmouth aimed at promising early-career researchers in cosmology. The successful candidate will have demonstrated excellence in research, complementing and extending the existing ICG research interests and expertise. Over the course of the fellowship, they will be expected to develop their own programme of research and innovation, and help attract external funding to the ICG. The ICG consists of 17 academic staff, 17 postdoctoral researchers and around 30 PhD students, and has an active international visitors programme. Portsmouth is a member of the Sloan Digital Sky Survey (SDSS), the Dark Energy Survey (DES), the Large Synoptic Survey Telescope (LSST), the Dark Energy Spectroscopic Instrument (DESI), ESA's Euclid satellite mission, the Square Kilometre Array (SKA), the Laser Interferometer Gravitational Wave Observatory (LIGO), the Laser Interferometer Space Antenna (LISA), the Gravitational Wave Optical Transient Observer (GOTO), and other international collaborations. The University of Portsmouth is a member of the South-East Physics Network (SEPnet) and hosts the 3704-core SCIAMA supercomputer. We welcome applications from all qualified applicants, but applications are particularly encouraged from traditionally under-represented groups in science. We are happy to consider applications from candidates wishing to work part-time, job-share or who wish to work flexibly. The University of Portsmouth and the ICG hold Athena SWAN Bronze awards; we are committed to developing organisational and cultural practices that promote diversity and equality and create a better working environment for women and men. Applications (application form, CV, publication list and research proposal for the fellowship) should be submitted by the closing date via the online application system. Applicants should also arrange for three reference letters to be sent to arrive by the same date. We expect the fellowship to start 1st October 2021 or as close to that date as feasible. All applications for this position will be processed and conducted in compliance with UK legislation relevant at that time. Applications from candidates who require sponsorship to work in the UK are welcome and will be considered alongside all other applications. As an equal opportunities employer, we welcome applications from all suitably qualified persons and all appointments will be made on merit. As we are committed to the principles of the Race Equality Charter Mark, we would particularly welcome applications from the Black, Asian and Minority Ethnic (BAME) community who are currently under-represented at this level in this area. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ============================================== 3. News ============================================== 3.1. SageMath 9.2 is out ------------------------------------------------------------ Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/03/sagemath-9-2-is-out/ Additional Information: https://sagemanifolds.obspm.fr/ SageMath 9.2 has been released on 24 October. The Linux and macOS binaries are available at https://www.sagemath.org/download.html. Those for Windows should follow soon, as well as Docker images. SageMath 9.2 is also available online at https://cocalc.com. Regarding calculus on manifolds, SageMath 9.2 introduces new features: - orientation of manifolds and vector bundles - dot_product(), cross_product() and norm() can be now be used for vector fields defined along a curve in a pseudo-Riemannian manifold - action of a bundle connection on sections - Greek letters (and more generally Unicode characters) are now allowed in index notation for tensors - diff(f) can be used to get the exterior derivative of a differential form f - various code improvements and bug fixes See https://sagemanifolds.obspm.fr/changelog.html for details and examples. SageMath is a free computer algebra system based on Python, with some differential geometry and tensor calculus capabilities See https://sagemanifolds.obspm.fr/examples.html for examples of use, in particular in the context of general relativity. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3.2. GRG Collection and Living Review on "Binary neutron star mergers" ------------------------------------------------------------ Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/23/grg-topical-collection-binary... Additional Information: https://link.springer.com/journal/10714/topicalCollection/AC_9a60abfc79f3d06... The journal General Relativity and Gravitation is publishing an ongoing Topical Collection "Binary Neutron Star Mergers". These recent additions deserve special attention: Katerina Chatziioannou. Neutron-star tidal deformability and equation-of-state constraints. Gen Relativ Gravit 52, 109 (2020). https://doi.org/10.1007/s10714-020-02754-3 https://rdcu.be/cbbk5 Sebastiano Bernuzzi. Neutron star merger remnants. Gen Relativ Gravit 52, 108 (2020). https://doi.org/10.1007/s10714-020-02752-5 Read also this related publication: Eric Burns. Neutron star mergers and how to study them. Living Rev Relativ 23, 4 (2020). https://doi.org/10.1007/s41114-020-00028-7 GRG welcomes contributed submissions to be included as original research articles in this collection. Authors are invited to submit through the website https://www.editorialmanager.com/gerg/. Please indicate that your manuscript is intended for inclusion in the special issue "T.C. : BNS mergers". ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3.3. Experimental Results - New Open Access Journal ------------------------------------------------------------ Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/26/experimental-results-new-open... Additional Information: https://www.cambridge.org/core/journals/experimental-results Experimental Results is an innovative new open access journal from Cambridge University Press that provides researchers with a venue to publish all experimental findings. Publication of valid scientific results as short papers, regardless of their outcome, enables the journal to fundamentally address the growing issues of reproducibility and duplication in the scientific community. Young researchers are invited to submit their contributions (even though only incremental) to experiments and collaborations in gravitational physics. The journal is now open for submissions, find out more at cambridge.org/exp and twitter.com/ExpResults ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3.4. The Twenty-First Release of the Einstein Toolkit ------------------------------------------------------------ Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2020/11/30/the-twenty-first-release-of-t... Additional Information: http://einsteintoolkit.org/about/releases/ET_2020_11_announcement.html Release Announcement We are pleased to announce the twenty-first release (code name "DeWitt-Morette") of the Einstein Toolkit, an open-source, community developed software infrastructure for relativistic astrophysics. The highlights of this release are: * This release includes NRPyPN, a Python code to compute initial data parameters for binary black hole simulations. * Lean_Public supports curvilinear coordinates provided by Llama. * The include style ("old") Tmunu interface using thorn ADMCoupling has been removed. One new thorn has been added: * ReadInterpolate, a FileReader like thorn that uses InterolateLocalUniform to interpolate the data read in onto the new grid. In addition, bug fixes accumulated since the previous release in May 2020 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 GRHydro and IllinoisGRMHD. 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[AT]einsteintoolkit.org. The Einstein Toolkit is primarily supported by NSF 2004157/2004044/2004311/2004879/2003893 (Enabling fundamental research in the era of multi-messenger astrophysics). Roland Haas, Steven R. Brandt, Rahime Matur, Beyhan Karakas, William E. Gabella, Miguel Gracia November, 2020 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++