There were three contributions during the group’s meeting on Monday 12.6.23. Dr. Aindriú Conroy from UTF discussed a study “On observable signals of non-singular cosmologies“, Dr. Alexandre M. Pombo from FZU presented “Boson Stars that mimic Black Holes ” and Angelica Albertini from ASU presented the effort “Towards an Effective-One-Body model for Extreme-Mass-Ratio Inspirals“.