FROM TH2F
constant
0.015331237954814506+-0.015725076528051826
chi2/ndof = 0.01612319465153558
plane
0.07392315853907955+-0.11108600567293322
invpt slope = 0.006360370253783085+-0.015477015393750793
theta slope = -0.053182142921480845+-0.08458278262418835
chi2/ndof = 0.003877310641820764
from tgraph2D
constant
0.028658363591944448+-0.002661143730985965
chi2/ndof = 0.0004815546450775768
plane
0.10638194703614817+-0.0060208445980124555
invpt slope = 0.007113037542416972+-0.0010822590319064759
theta slope = -0.08130980860991524+-0.005187186021253977
chi2/ndof = 9.156711023932166e-05