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--- tests:collision:gc4 [2016/10/11 07:57] – v.henault-brunet
+++ tests:collision:gc4 [2022/10/24 12:26] (current) – external edit 127.0.0.1
@@ Line 9: / Line 9: @@
 Some preliminary results from GCIII are shown [[:tests:collision:gc3:method_comp|here]]
-The current plan is to turn this M4 challenge into one ‘Gaia Challenge' paper (coordinated by V. Henault-Brunet), with contributions from the following people/methods (others welcome too):
+The current plan is to turn this M4 challenge into one ‘Gaia Challenge' paper (coordinated by Vincent), with contributions from the following people/methods (others welcome too):
   - Jeans modelling (Laura & Antonio - each with their own code)
@@ Line 17: / Line 17: @@
   - Single-mass models with potential escapers (Ian)
+The plan is to use combined datasets with increasing level of information:
+  - The surface brightness profile and line-of-sight velocity dispersion profile
+  - Then additionally consider HST-like proper-motion dispersion profiles
+  - Finally, fits including all the previous data and including Gaia-like proper motions and distances
+Mock data for steps 1 and 2 are currently available. For step 3, Elena Pancino is working on producing Gaia-like observations of the M4 snapshot (with different simulated backgrounds).
+We want to compare how well the different methods recover or fit the following quantities/observables:
+  - total cluster mass $M$
+  - half-mass radius $r_h$
+  - global mass-to-light ratio $M/L$
+  - $M/L$ profile
+  - general quality of the fit to the velocity dispersion, surface brightness, and anisotropy profile
+  - constraints on the stellar mass function (where applicable)
+  - mass in dark remnants (where applicable)
+You can put your [[:tests:collision:gc4:method_comp|results and any interesting plots/ideas here]].
-=== Number density profiles of GCs from Gaia data ===