FROM TH2F
constant
0.01499774752058945+-0.01666541523945045
chi2/ndof = 0.012936013688417894
plane
0.07116980693538541+-0.11618758622675132
invpt slope = 0.007322799790819533+-0.018211746370701096
theta slope = -0.054122051858901066+-0.09383237571057887
chi2/ndof = 0.003160435972659342
from tgraph2D
constant
0.02499664729700162+-0.002260397752322596
chi2/ndof = 0.0003116732779212534
plane
0.07301846277612073+-0.00696644935350835
invpt slope = 0.010619463806613147+-0.0010576363363787944
theta slope = -0.058387815364207056+-0.00625882814134938
chi2/ndof = 7.603801035334473e-05