FROM TH2F
constant
0.005396805403778056+-0.010494707514029821
chi2/ndof = 0.007572911246131919
plane
0.06371829085679337+-0.11713144604185292
invpt slope = 0.0014495123680226684+-0.010524895955684215
theta slope = -0.04535971552652139+-0.09086334572117478
chi2/ndof = 0.0024191047831151427
from tgraph2D
constant
0.012417246766617714+-0.0006255793147295563
chi2/ndof = 2.0741522387944564e-05
plane
0.03803707259861282+-0.004707011484464612
invpt slope = 0.0015461771238119973+-0.0002822943859189685
theta slope = -0.02310586623826036+-0.0037426479362083816
chi2/ndof = 9.423176984645612e-06