FROM TH2F
constant
0.02706566663880561+-0.01605516284028985
chi2/ndof = 0.004208451237398444
plane
0.031150692675396014+-0.10407651203910857
invpt slope = 0.0022932306355453597+-0.008800008703381159
theta slope = -0.008880743703155457+-0.08644298111185798
chi2/ndof = 0.0035737715282484718
from tgraph2D
constant
0.0300533722477765+-0.0010636500627820538
chi2/ndof = 0.00012558001162537048
plane
0.029115517856879297+-0.0053553010924719145
invpt slope = 0.0035738805706643974+-0.00042757049244955493
theta slope = -0.008020912084886488+-0.004486433554382904
chi2/ndof = 7.745231974008164e-05