FROM TH2F
constant
0.5123224061120455+-0.04771780035246766
chi2/ndof = 0.43467262378923727
plane
-0.05200230579558478+-0.10724752812836937
invpt slope = -0.01973949038332948+-0.028966117965140002
theta slope = 1.123100065531829+-0.1378431365688026
chi2/ndof = 0.13210798784441946
from tgraph2D
constant
0.9223545975568785+-0.048888139547580096
chi2/ndof = 0.5855622945206829
plane
-0.3094063682099529+-0.055281988014554306
invpt slope = -0.02236941732679823+-0.012566285041887452
theta slope = 1.6061413482329452+-0.05653621113718524
chi2/ndof = 0.1331836263811981