FROM TH2F
constant
0.04182382066248799+-0.01747235995600766
chi2/ndof = 0.02962672123938029
plane
0.07956736010887076+-0.09764946742009763
invpt slope = 0.015910830777339957+-0.008796916388965001
theta slope = -0.06362735755622106+-0.08670213097961564
chi2/ndof = 0.003934674677187496
from tgraph2D
constant
0.06758199401581186+-0.0036413157973257033
chi2/ndof = 0.001922581207454358
plane
0.09581137829503789+-0.007594462441443717
invpt slope = 0.0180231937085602+-0.000667164512397706
theta slope = -0.08220796365696038+-0.007409172915364685
chi2/ndof = 0.000316887709592523