Participants: Adriano Agnello, Mark Gieles, Vincent Henault-Brunet, Miklos Peuten, Alice Zocchi

Questions to address:

1. Provided that multi-mass models do a good job in describing the kinematics (see Challenge 2), can we derive the mass function of the remnants from the luminous stars and the kinematics?
2. How does this depend on the retention fraction of black holes?

The snapshots from section B of the Mock data page can be used to tackle this challenge.