There were three contributions during the group’s meeting on Thursday 23.2.23. Dr. Asen Christov from FZU provided a “FSUA status update” discussing the Czech hardware contribution to the LISA mission, Dr. Vojtěch Witzany from UTF presented an overview on “EMRI waveforms: a status update” and Dr. Samuel Upton from ASU discussed the “Progress in the Field of Gravitational Self-Force“.

There were three scientific contributions during the group’s meeting on Tuesday 7.12.22. Dr. Sajal Mukherjee from ASU discussed his work on “Resonance crossing in an electromagnetic EMRI analogue“, Dr. Robert Švarc from UTF talked about “Expanding impulsive gravitational waves” and Dr. Lorenzo Pizzuti from FZU discussed his work on “Stochastic Gravitational Wave Background and Boltzmann equation“.

There were three scientific contributions during the group’s meeting on Thursday 6.8.22. Dr. Petra Suková from ASU talked about “Observational traces of supermassive black hole companions“, Dr. Tayebeh Tahamtan from UTF talked about ” Slowly rotating black holes in nonlinear electrodynamics” and Dr. Ippocratis Saltas from FZU presented two publications of the Cosmology WG of the LISA consortium (arxiv: 2204.05434 and arxiv:2203.00566).

There were three scientific contributions during the group’s meeting on Thursday 2.6.22. Dr. Sk Jahanur Hoquefrom from UTF talked about “Quadrupole formula in de Sitter: its application ”, Dr. Kabir Chakravarti from FZU talked about “Gravitational Waves, Neutron Star Equation of State inference and Phase Transitions” and Dr. Morteza Kerachian from ASU talked about “Action-Angle formalism for geodesic motion in Kerr spacetime as a tool for EMRIs”.

There were three scientific contributions during the group’s meeting on Friday 11.03.22. Dr. Rome Samanta from FZU talked about “Gravitational Waves as a Probe of Super-Heavy Dark matter”, Mgr. Viktor Skoupý from ASU/UTF talked about “Adiabatic equatorial inspirals of a spinning body into a Kerr black hole” and Mgr. Lukáš Polcar from UTF/ASU talked about “Computing EMRI using canonical perturbation theory”.

There were three scientific contributions during the group’s meeting on Friday 3.12.21. . Mgr. Angelica Albertini from ASU gave a talk on “TEOBREsumS: an Effective-One-Body waveform model for coalescing black hole binaries”, Dr. Ogan Özsoy from FZU talked about “GWs from Axion-Gauge Field Dynamics during inflation” and Dr. Martin Žofka from UTF talked about “Springy relativistic toys”.

There were three scientific contributions during the group’s meeting on Wednesday 29.9.21. . Dr. Tomáš Ledvinka from UTF gave a talk on “Universality of curvature invariants in critical vacuum gravitational collapse”, Dr. Ondřéj Kopáček from ASU talked about “Null Points in the Magnetosphere of a Plunging Neutron Star” and Dr. Asen Christov from FZU talked about “LISA Mission and the Czech involvement”.

There were three scientific contributions during the group’s meeting on Tuesday 22.6.21. . Dr. Sajal Mukherjee from ASU gave a talk on “Detectability of hyperbolic encounters with the gravitational wave observatories“, Dr. Robert Švarc from UTF talked about “Spherical Black Holes in Quadratic Gravity” and Dr. Filip Hejda from FZU talked about “Collisional Penrose process and extraction of energy from extremal electrovacuum black holes“.

The Black Hole Perturbation Toolkit (BHPToolkit) is a global collaboration dedicated to creating an open-source repository of software, data and results related to black hole perturbation theory. These tools are important in the theory of gravitational waves, specifically in the modelling of inspirals of stellar-mass objects into massive black holes. The BHPToolkit workshops bring together researchers that are already using and developing the Toolkit as well as scientists and students that are looking to do so.

The first public BHPToolkit workshop will take place at the Astronomical Institute of the Czech Academy of Sciences in Prague from 25th to 27th of May. take place in the form of a teleconference at the end of May. The exact dates will be announced soon. For the meeting in Prague itself further announcements will follow.

Registration is free and we have a small amount of funding available to support the travel of PhD/MSc students coming to the workshop. To apply for financial support please send an email to vojtech.witzany at asu.cas.cz in which you briefly describe your motivation, and please ask your supervisor to also send a short supporting email. Both the motivation and supporting statement need to be received before April 1, 2020, and we will inform you of our decision during the first week of April.

On the first day of the workshop there will be a series of invited practical short talks to demonstrate how to install and use various packages already in the Toolkit. The second and third days will concentrate on improving the BHPToolkit with a focused ‘hack-a-thon’ as well as discussion around how to manage and grow the Toolkit.

The BHPToolkit workshop, including the travel support, is funded by the GWverse COST Action CA16104 Gravitational waves, black holes and fundamental physics.

Prague Relativity Group is member of the LISA mission consortium (Laser Interferometer Space Antenna). The group consists of scientists from the Astronomical Institute of the Czech Academy of Sciences (ASU), the Institute of Theoretical Physics of the Charles University (UTF) and the Institute of Physics of the Czech Academy of Sciences (FZU). In alphabetical order, the participating scientists are:

• Mgr. Angelica Albertini (ASU) angelica.albertini (at ) asu.cas.cz
• prof. RNDr. Jiří Bičák, DrSc. dr. h. c. (UTF) Jiri.Bicak (at) mff.cuni.cz
• Aindriú Conroy, Ph.D. (UTF) aindriu.conroy (at) matfyz.cuni.cz
• RNDr. Michal Dovčiak, Ph.D. (ASU) dovciak (at) asu.cas.cz
• prof. Vladimír Karas, DrSc. (ASU) vladimir.karas (at) cuni.cz
• Morteza Kerachian, Ph.D. (ASU) morteza.kerachian (at) asu.cas.cz
• Mgr. Ondřej Kopáček, Ph.D. (ASU) kopacek (at) ig.cas.cz
• Georgios Loukes-Gerakopoulos, Ph.D. (ASU) gglukes (at) asu.cas.cz
• Sajal Mukherjee, Ph.D. (ASU) sajal.mukherjee (at) asu.cas.cz
  Ogan Özsoy, Ph.D. (FZU) ozsoy (at) fzu.cz
• Mgr. Ondřej Pejcha, PhD. (UTF) pejcha (at) utf.mff.cuni.cz
• RNDr. Michael Prouza, Ph.D. (FZU) prouza (at) fzu.cz
• prof. RNDr. Jiří Podolský, CSc., DSc. (UTF) podolsky (at) mbox.troja.mff.cuni.cz
• Mgr. Lukáš Polcar (UTF/ASU) Polcar.vm (at) seznam.cz
• Mgr. Viktor Skoupý (UTF/ASU) vskoupy (at) gmail.com
• Mgr. Petra Suková, Ph.D. (ASU) petra.sukova (at) asu.cas.cz
• RNDr. Robert Švarc, Ph.D. (UTF) robert.svarc (at) mff.cuni.cz
• Mgr. Jiří Svoboda, Ph.D. (ASU) jiri.svoboda (at) asu.cas.cz
• Tayebeh Tahamtan, Ph.D. (UTF) ttahamtan5 (at) gmail.com
• Sam Upton, Ph.D. (ASU) upton (at) asu.cas.cz
• Vojtěch Witzany, Ph.D. (UTF) vojtech.witzany (at) matfyz.cuni.cz
• Mgr. Richard Wünsch, Ph.D. (ASU) richard (at) wunsch.cz