FROM TH2F
constant
0.03081507598282366+-0.025882290397141336
chi2/ndof = 0.004152143383249962
plane
0.026201292100417488+-0.311286779747105
invpt slope = 0.0014173983642619646+-0.0189554943099372
theta slope = 0.0012113737275711162+-0.23616926790790638
chi2/ndof = 0.004212707367028646
from tgraph2D
constant
0.03472461611408374+-0.0014391444638339784
chi2/ndof = 0.00010355683938910906
plane
0.03314975671478847+-0.014602683631908463
invpt slope = 0.003745524464936566+-0.0008078467822751381
theta slope = -0.004849554384112151+-0.011289803473274997
chi2/ndof = 7.342505013402076e-05