Active participants: Ian Claydon, Mark Gieles, Vincent Henault-Brunet, Miklos Peuten, Anna Lisa Varri, Laura Watkins, Alice Zocchi.

For this Challenge, initiated in GC III in Barcelona, we decided to compare fitting methods

1. Jeans modelling (Laura)
2. Single mass DF modelling (Alice)
3. Multimass DF modelling (Miklos, Mark)

Results can go here

What will Gaia actually give us (for GCs, open clusters, runaway stars, hypervelocity stars)? What can we do with TGAS?

a) quantify biases from ignoring them

b) towards self-consistent mixture models with potential escapers

include prescription for rotation in multi-mass DF models.