FROM TH2F
constant
0.03989594642765126+-0.018545365270798586
chi2/ndof = 0.014036011936298576
plane
0.06829995274360946+-0.10129789501474568
invpt slope = 0.007828004532312206+-0.009209251820253023
theta slope = -0.04225413851245391+-0.09379303430736335
chi2/ndof = 0.007437998975636733
from tgraph2D
constant
0.05121627197799147+-0.0023017624863512095
chi2/ndof = 0.0006516675968030602
plane
0.0772338251257366+-0.007556463842034831
invpt slope = 0.009848176618413642+-0.0007770959513350267
theta slope = -0.05024686095191304+-0.007358655587988704
chi2/ndof = 0.0002783072437215237