FROM TH2F
constant
0.023796295216048806+-0.024390723244613676
chi2/ndof = 0.009442581038416876
plane
0.05882935774507127+-0.19403345282082357
invpt slope = 0.011327096663673784+-0.028811440401568945
theta slope = -0.047043228815003876+-0.17841407086552055
chi2/ndof = 0.0018473360835857702
from tgraph2D
constant
0.030632343714915584+-0.002239873412014825
chi2/ndof = 0.0002257664805834496
plane
0.059826916757496955+-0.007459881242466529
invpt slope = 0.010980437396823795+-0.0010159731602353693
theta slope = -0.04583679067249002+-0.007330843809823315
chi2/ndof = 4.521999536872496e-05