Fit N-sigma 2D histogram with TMinuit

[moneta]

Hi,
I think this topic is already discussed in

2D histogram fit

Dear Rooters, I’d like to fit the 2D histogram in attachment. I tried to fit it with a 2D gaussian like show in the example fit2dHist.C : root.cern.ch/doc/master/fit2dHist_8C.html. This example was adapted to my situation (see the code in attachment). It works ( ) but ( ) I don’t achieve to a good fit (I change all parameters several times). Maybe I should not use a 2D gaussian fit for this situation. I think of not being so far from the good fit, I hope though … I…

Lorenzo