FROM TH2F
constant
0.017317058571923356+-0.015401947293914298
chi2/ndof = 0.010638269208575211
plane
0.050409148354919275+-0.0917379736973167
invpt slope = 0.005767821675797905+-0.011886867366010015
theta slope = -0.03439235667662583+-0.07442935208676835
chi2/ndof = 0.004712370481332637
from tgraph2D
constant
0.025626904912639706+-0.0018975277216985943
chi2/ndof = 0.00028804891636028063
plane
0.0727802221019555+-0.005304782527362288
invpt slope = 0.007213570167316284+-0.0007704878412353517
theta slope = -0.05340673446252255+-0.00471027050675434
chi2/ndof = 8.785272600166091e-05