FROM TH2F
constant
0.011201720016007609+-0.029354229174987596
chi2/ndof = 0.0023331055677693895
plane
0.06498264752836015+-0.4944248022294015
invpt slope = 0.0025921485807346824+-0.04703882906690852
theta slope = -0.0443581952500512+-0.37945016617136285
chi2/ndof = 0.0009403031190936408
from tgraph2D
constant
0.012764453262207012+-0.0010877593130960634
chi2/ndof = 1.8931525171639417e-05
plane
0.043784968594194014+-0.012963026407839067
invpt slope = 0.002764706465111328+-0.000903363520283231
theta slope = -0.026833733761072683+-0.010160231553458146
chi2/ndof = 8.477038872764911e-06